Search | arXiv e-print repository

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"/> <meta name="viewport" content="width=device-width, initial-scale=1"/>  <link rel="apple-touch-icon" sizes="180x180" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/apple-touch-icon.png"> <link rel="icon" type="image/png" sizes="32x32" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/favicon-32x32.png"> <link rel="icon" type="image/png" sizes="16x16" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/favicon-16x16.png"> <link rel="manifest" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/site.webmanifest"> <link rel="mask-icon" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/safari-pinned-tab.svg" color="#b31b1b"> <link rel="shortcut icon" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/favicon.ico"> <meta name="msapplication-TileColor" content="#b31b1b"> <meta name="msapplication-config" content="images/icons/browserconfig.xml"> <meta name="theme-color" content="#b31b1b">  <title>Search | arXiv e-print repository</title> <script defer src="https://static.arxiv.org/static/base/1.0.0a5/fontawesome-free-5.11.2-web/js/all.js"></script> <link rel="stylesheet" href="https://static.arxiv.org/static/base/1.0.0a5/css/arxivstyle.css" /> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ messageStyle: "none", extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\$","\$"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true, ignoreClass: '.*', processClass: 'mathjax.*' }, TeX: { extensions: ["AMSmath.js", "AMSsymbols.js", "noErrors.js"], noErrors: { inlineDelimiters: ["$","$"], multiLine: false, style: { "font-size": "normal", "border": "" } } }, "HTML-CSS": { availableFonts: ["TeX"] } }); </script> <script src='//static.arxiv.org/MathJax-2.7.3/MathJax.js'></script> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/notification.js"></script> <link rel="stylesheet" href="https://static.arxiv.org/static/search/0.5.6/css/bulma-tooltip.min.css" /> <link rel="stylesheet" href="https://static.arxiv.org/static/search/0.5.6/css/search.css" /> <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha256-k2WSCIexGzOj3Euiig+TlR8gA0EmPjuc79OEeY5L45g=" crossorigin="anonymous"></script> <script src="https://static.arxiv.org/static/search/0.5.6/js/fieldset.js"></script> <style> radio#cf-customfield_11400 { display: none; } </style> </head> <body> <header><a href="#main-container" class="is-sr-only">Skip to main content</a>  <div class="attribution level is-marginless" role="banner"> <div class="level-left"> <a class="level-item" href="https://cornell.edu/"><img src="https://static.arxiv.org/static/base/1.0.0a5/images/cornell-reduced-white-SMALL.svg" alt="Cornell University" width="200" aria-label="logo" /></a> </div> <div class="level-right is-marginless"><p class="sponsors level-item is-marginless"><span id="support-ack-url">We gratefully acknowledge support from<br /> the Simons Foundation, <a href="https://info.arxiv.org/about/ourmembers.html">member institutions</a>, and all contributors. <a href="https://info.arxiv.org/about/donate.html">Donate</a></span></p></div> </div>  <div class="identity level is-marginless"> <div class="level-left"> <div class="level-item"> <a class="arxiv" href="https://arxiv.org/" aria-label="arxiv-logo"> <img src="https://static.arxiv.org/static/base/1.0.0a5/images/arxiv-logo-one-color-white.svg" aria-label="logo" alt="arxiv logo" width="85" style="width:85px;"/> </a> </div> </div> <div class="search-block level-right"> <form class="level-item mini-search" method="GET" action="https://arxiv.org/search"> <div class="field has-addons"> <div class="control"> <input class="input is-small" type="text" name="query" placeholder="Search..." aria-label="Search term or terms" /> <p class="help"><a href="https://info.arxiv.org/help">Help</a> | <a href="https://arxiv.org/search/advanced">Advanced Search</a></p> </div> <div class="control"> <div class="select is-small"> <select name="searchtype" aria-label="Field to search"> <option value="all" selected="selected">All fields</option> <option value="title">Title</option> <option value="author">Author</option> <option value="abstract">Abstract</option> <option value="comments">Comments</option> <option value="journal_ref">Journal reference</option> <option value="acm_class">ACM classification</option> <option value="msc_class">MSC classification</option> <option value="report_num">Report number</option> <option value="paper_id">arXiv identifier</option> <option value="doi">DOI</option> <option value="orcid">ORCID</option> <option value="author_id">arXiv author ID</option> <option value="help">Help pages</option> <option value="full_text">Full text</option> </select> </div> </div> <input type="hidden" name="source" value="header"> <button class="button is-small is-cul-darker">Search</button> </div> </form> </div> </div>  <div class="container"> <div class="user-tools is-size-7 has-text-right has-text-weight-bold" role="navigation" aria-label="User menu"> <a href="https://arxiv.org/login">Login</a> </div> </div> </header> <main class="container" id="main-container"> <div class="level is-marginless"> <div class="level-left"> <h1 class="title is-clearfix"> Showing 1–50 of 52 results for author: <span class="mathjax">Cates, G</span> </h1> </div> <div class="level-right is-hidden-mobile">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> <div class="content"> <form method="GET" action="/search/nucl-ex" aria-role="search"> Searching in archive <strong>nucl-ex</strong>. <a href="/search/?searchtype=author&query=Cates%2C+G">Search in all archives.</a> <div class="field has-addons-tablet"> <div class="control is-expanded"> <label for="query" class="hidden-label">Search term or terms</label> <input class="input is-medium" id="query" name="query" placeholder="Search term..." type="text" value="Cates, G"> </div> <div class="select control is-medium"> <label class="is-hidden" for="searchtype">Field</label> <select class="is-medium" id="searchtype" name="searchtype"><option value="all">All fields</option><option value="title">Title</option><option selected value="author">Author(s)</option><option value="abstract">Abstract</option><option value="comments">Comments</option><option value="journal_ref">Journal reference</option><option value="acm_class">ACM classification</option><option value="msc_class">MSC classification</option><option value="report_num">Report number</option><option value="paper_id">arXiv identifier</option><option value="doi">DOI</option><option value="orcid">ORCID</option><option value="license">License (URI)</option><option value="author_id">arXiv author ID</option><option value="help">Help pages</option><option value="full_text">Full text</option></select> </div> <div class="control"> <button class="button is-link is-medium">Search</button> </div> </div> <div class="field"> <div class="control is-size-7"> <label class="radio"> <input checked id="abstracts-0" name="abstracts" type="radio" value="show"> Show abstracts </label> <label class="radio"> <input id="abstracts-1" name="abstracts" type="radio" value="hide"> Hide abstracts </label> </div> </div> <div class="is-clearfix" style="height: 2.5em"> <div class="is-pulled-right"> <a href="/search/advanced?terms-0-term=Cates%2C+G&terms-0-field=author&size=50&order=-announced_date_first">Advanced Search</a> </div> </div> <input type="hidden" name="order" value="-announced_date_first"> <input type="hidden" name="size" value="50"> </form> <div class="level breathe-horizontal"> <div class="level-left"> <form method="GET" action="/search/"> <div style="display: none;"> <select id="searchtype" name="searchtype"><option value="all">All fields</option><option value="title">Title</option><option selected value="author">Author(s)</option><option value="abstract">Abstract</option><option value="comments">Comments</option><option value="journal_ref">Journal reference</option><option value="acm_class">ACM classification</option><option value="msc_class">MSC classification</option><option value="report_num">Report number</option><option value="paper_id">arXiv identifier</option><option value="doi">DOI</option><option value="orcid">ORCID</option><option value="license">License (URI)</option><option value="author_id">arXiv author ID</option><option value="help">Help pages</option><option value="full_text">Full text</option></select> <input id="query" name="query" type="text" value="Cates, G"> <ul id="abstracts"><li><input checked id="abstracts-0" name="abstracts" type="radio" value="show"> <label for="abstracts-0">Show abstracts</label></li><li><input id="abstracts-1" name="abstracts" type="radio" value="hide"> <label for="abstracts-1">Hide abstracts</label></li></ul> </div> <div class="box field is-grouped is-grouped-multiline level-item"> <div class="control"> <span class="select is-small"> <select id="size" name="size"><option value="25">25</option><option selected value="50">50</option><option value="100">100</option><option value="200">200</option></select> </span> <label for="size">results per page</label>. </div> <div class="control"> <label for="order">Sort results by</label> <span class="select is-small"> <select id="order" name="order"><option selected value="-announced_date_first">Announcement date (newest first)</option><option value="announced_date_first">Announcement date (oldest first)</option><option value="-submitted_date">Submission date (newest first)</option><option value="submitted_date">Submission date (oldest first)</option><option value="">Relevance</option></select> </span> </div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <nav class="pagination is-small is-centered breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Cates%2C+G&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Cates%2C+G&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Cates%2C+G&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> </ul> </nav> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2409.16370">arXiv:2409.16370</a> <span> [<a href="https://arxiv.org/pdf/2409.16370">pdf</a>, <a href="https://arxiv.org/format/2409.16370">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Quasielastic $\overrightarrow{^{3}\mathrm{He}}(\overrightarrow{e},{e'})$ Asymmetry in the Threshold Region </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Nycz%2C+M">M. Nycz</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W">W. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Bai%2C+X">X. Bai</a>, <a href="/search/nucl-ex?searchtype=author&query=Bane%2C+J">J. Bane</a>, <a href="/search/nucl-ex?searchtype=author&query=Barcus%2C+S">S. Barcus</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhatt%2C+H">H. Bhatt</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhetuwal%2C+D">D. Bhetuwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Biswas%2C+D">D. Biswas</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G">G. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J">J-P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J">J. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+M">M. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Cotton%2C+C">C. Cotton</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M">M-M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Deltuva%2C+A">A. Deltuva</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Dhital%2C+B">B. Dhital</a>, <a href="/search/nucl-ex?searchtype=author&query=Duran%2C+B">B. Duran</a>, <a href="/search/nucl-ex?searchtype=author&query=Dusa%2C+S+C">S. C. Dusa</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernando%2C+I">I. Fernando</a>, <a href="/search/nucl-ex?searchtype=author&query=Fuchey%2C+E">E. Fuchey</a> , et al. (75 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2409.16370v1-abstract-short" style="display: inline;"> A measurement of the double-spin asymmetry from electron-$^{3}$He scattering in the threshold region of two- and three-body breakup of $^{3}$He was performed at Jefferson Lab, for Q$^{2}$ values of 0.1 and 0.2 (GeV/$c$)$^{2}$. The results of this measurement serve as a stringent test of our understanding of few-body systems. When compared with calculations from plane wave impulse approximation and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.16370v1-abstract-full').style.display = 'inline'; document.getElementById('2409.16370v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.16370v1-abstract-full" style="display: none;"> A measurement of the double-spin asymmetry from electron-$^{3}$He scattering in the threshold region of two- and three-body breakup of $^{3}$He was performed at Jefferson Lab, for Q$^{2}$ values of 0.1 and 0.2 (GeV/$c$)$^{2}$. The results of this measurement serve as a stringent test of our understanding of few-body systems. When compared with calculations from plane wave impulse approximation and Faddeev theory, we found that the Faddeev calculations, which use modern nuclear potentials and prescriptions for meson-exchange currents, demonstrate an overall good agreement with data. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.16370v1-abstract-full').style.display = 'none'; document.getElementById('2409.16370v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.09360">arXiv:2306.09360</a> <span> [<a href="https://arxiv.org/pdf/2306.09360">pdf</a>, <a href="https://arxiv.org/format/2306.09360">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> </div> <p class="title is-5 mathjax"> Strong Interaction Physics at the Luminosity Frontier with 22 GeV Electrons at Jefferson Lab </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Accardi%2C+A">A. Accardi</a>, <a href="/search/nucl-ex?searchtype=author&query=Achenbach%2C+P">P. Achenbach</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+D">D. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Afanasev%2C+A">A. Afanasev</a>, <a href="/search/nucl-ex?searchtype=author&query=Akondi%2C+C+S">C. S. Akondi</a>, <a href="/search/nucl-ex?searchtype=author&query=Akopov%2C+N">N. Akopov</a>, <a href="/search/nucl-ex?searchtype=author&query=Albaladejo%2C+M">M. Albaladejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Albataineh%2C+H">H. Albataineh</a>, <a href="/search/nucl-ex?searchtype=author&query=Albrecht%2C+M">M. Albrecht</a>, <a href="/search/nucl-ex?searchtype=author&query=Almeida-Zamora%2C+B">B. Almeida-Zamora</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaryan%2C+M">M. Amaryan</a>, <a href="/search/nucl-ex?searchtype=author&query=Androi%C4%87%2C+D">D. Androi膰</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W">W. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Arratia%2C+M">M. Arratia</a>, <a href="/search/nucl-ex?searchtype=author&query=Arrington%2C+J">J. Arrington</a>, <a href="/search/nucl-ex?searchtype=author&query=Asaturyan%2C+A">A. Asaturyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Austregesilo%2C+A">A. Austregesilo</a>, <a href="/search/nucl-ex?searchtype=author&query=Avagyan%2C+H">H. Avagyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Bacchetta%2C+A">A. Bacchetta</a>, <a href="/search/nucl-ex?searchtype=author&query=Balantekin%2C+A+B">A. B. Balantekin</a>, <a href="/search/nucl-ex?searchtype=author&query=Baltzell%2C+N">N. Baltzell</a>, <a href="/search/nucl-ex?searchtype=author&query=Barion%2C+L">L. Barion</a> , et al. (419 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2306.09360v2-abstract-short" style="display: inline;"> This document presents the initial scientific case for upgrading the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab (JLab) to 22 GeV. It is the result of a community effort, incorporating insights from a series of workshops conducted between March 2022 and April 2023. With a track record of over 25 years in delivering the world's most intense and precise multi-GeV electron… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.09360v2-abstract-full').style.display = 'inline'; document.getElementById('2306.09360v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.09360v2-abstract-full" style="display: none;"> This document presents the initial scientific case for upgrading the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab (JLab) to 22 GeV. It is the result of a community effort, incorporating insights from a series of workshops conducted between March 2022 and April 2023. With a track record of over 25 years in delivering the world's most intense and precise multi-GeV electron beams, CEBAF's potential for a higher energy upgrade presents a unique opportunity for an innovative nuclear physics program, which seamlessly integrates a rich historical background with a promising future. The proposed physics program encompass a diverse range of investigations centered around the nonperturbative dynamics inherent in hadron structure and the exploration of strongly interacting systems. It builds upon the exceptional capabilities of CEBAF in high-luminosity operations, the availability of existing or planned Hall equipment, and recent advancements in accelerator technology. The proposed program cover various scientific topics, including Hadron Spectroscopy, Partonic Structure and Spin, Hadronization and Transverse Momentum, Spatial Structure, Mechanical Properties, Form Factors and Emergent Hadron Mass, Hadron-Quark Transition, and Nuclear Dynamics at Extreme Conditions, as well as QCD Confinement and Fundamental Symmetries. Each topic highlights the key measurements achievable at a 22 GeV CEBAF accelerator. Furthermore, this document outlines the significant physics outcomes and unique aspects of these programs that distinguish them from other existing or planned facilities. In summary, this document provides an exciting rationale for the energy upgrade of CEBAF to 22 GeV, outlining the transformative scientific potential that lies within reach, and the remarkable opportunities it offers for advancing our understanding of hadron physics and related fundamental phenomena. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.09360v2-abstract-full').style.display = 'none'; document.getElementById('2306.09360v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Updates to the list of authors; Preprint number changed from theory to experiment; Updates to sections 4 and 6, including additional figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-23-3840 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2205.11593">arXiv:2205.11593</a> <span> [<a href="https://arxiv.org/pdf/2205.11593">pdf</a>, <a href="https://arxiv.org/format/2205.11593">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.129.042501">10.1103/PhysRevLett.129.042501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Precision Determination of the Neutral Weak Form Factor of $^{48}$Ca </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+D">D. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Albataineh%2C+H">H. Albataineh</a>, <a href="/search/nucl-ex?searchtype=author&query=Androic%2C+D">D. Androic</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K+A">K. A. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Barcus%2C+S+K">S. K. Barcus</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellini%2C+V">V. Bellini</a>, <a href="/search/nucl-ex?searchtype=author&query=Beminiwattha%2C+R+S">R. S. Beminiwattha</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J+F">J. F. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhatt%2C+H">H. Bhatt</a>, <a href="/search/nucl-ex?searchtype=author&query=Pathak%2C+D+B">D. Bhatta Pathak</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhetuwal%2C+D">D. Bhetuwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Blaikie%2C+B">B. Blaikie</a>, <a href="/search/nucl-ex?searchtype=author&query=Boyd%2C+J">J. Boyd</a>, <a href="/search/nucl-ex?searchtype=author&query=Campagna%2C+Q">Q. Campagna</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+Y">Y. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Clarke%2C+C">C. Clarke</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Dusa%2C+S+C">S. Covrig Dusa</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Datta%2C+P">P. Datta</a> , et al. (77 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2205.11593v2-abstract-short" style="display: inline;"> We report a precise measurement of the parity-violating asymmetry $A_{\rm PV}$ in the elastic scattering of longitudinally polarized electrons from $^{48}{\rm Ca}$. We measure $A_{\rm PV} =2668\pm 106\ {\rm (stat)}\pm 40\ {\rm (syst)}$ parts per billion, leading to an extraction of the neutral weak form factor $F_{\rm W} (q=0.8733$ fm… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.11593v2-abstract-full').style.display = 'inline'; document.getElementById('2205.11593v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2205.11593v2-abstract-full" style="display: none;"> We report a precise measurement of the parity-violating asymmetry $A_{\rm PV}$ in the elastic scattering of longitudinally polarized electrons from $^{48}{\rm Ca}$. We measure $A_{\rm PV} =2668\pm 106\ {\rm (stat)}\pm 40\ {\rm (syst)}$ parts per billion, leading to an extraction of the neutral weak form factor $F_{\rm W} (q=0.8733$ fm$^{-1}) = 0.1304 \pm 0.0052 \ {\rm (stat)}\pm 0.0020\ {\rm (syst)}$ and the charge minus the weak form factor $F_{\rm ch} - F_{\rm W} = 0.0277\pm 0.0055$. The resulting neutron skin thickness $R_n-R_p=0.121 \pm 0.026\ {\rm (exp)} \pm 0.024\ {\rm (model)}$~fm is relatively thin yet consistent with many model calculations. The combined CREX and PREX results will have implications for future energy density functional calculations and on the density dependence of the symmetry energy of nuclear matter. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.11593v2-abstract-full').style.display = 'none'; document.getElementById('2205.11593v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 5 figures Replace 6-16-22: included ancillary files, corrected errors in references, author affiliations. Small text changes for clarity</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.04250">arXiv:2111.04250</a> <span> [<a href="https://arxiv.org/pdf/2111.04250">pdf</a>, <a href="https://arxiv.org/format/2111.04250">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.128.142501">10.1103/PhysRevLett.128.142501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> New Measurements of the Beam-Normal Single Spin Asymmetry in Elastic Electron Scattering Over a Range of Spin-0 Nuclei </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=PREX"> PREX</a>, <a href="/search/nucl-ex?searchtype=author&query=Collaborations%2C+C">CREX Collaborations</a>, <a href="/search/nucl-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+D">D. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Albataineh%2C+H">H. Albataineh</a>, <a href="/search/nucl-ex?searchtype=author&query=Androic%2C+D">D. Androic</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Barcus%2C+S">S. Barcus</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellini%2C+V">V. Bellini</a>, <a href="/search/nucl-ex?searchtype=author&query=Beminiwattha%2C+R+S">R. S. Beminiwattha</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J+F">J. F. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhatt%2C+H">H. Bhatt</a>, <a href="/search/nucl-ex?searchtype=author&query=Pathak%2C+D+B">D. Bhatta Pathak</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhetuwal%2C+D">D. Bhetuwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Blaikie%2C+B">B. Blaikie</a>, <a href="/search/nucl-ex?searchtype=author&query=Boyd%2C+J">J. Boyd</a>, <a href="/search/nucl-ex?searchtype=author&query=Campagna%2C+Q">Q. Campagna</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+Y">Y. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Clarke%2C+C">C. Clarke</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a> , et al. (82 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2111.04250v2-abstract-short" style="display: inline;"> We report precision determinations of the beam normal single spin asymmetries ($A_n$) in the elastic scattering of 0.95 and 2.18~GeV electrons off $^{12}$C, $^{40}$Ca, $^{48}$Ca, and $^{208}$Pb at very forward angles where the most detailed theoretical calculations have been performed. The first measurements of $A_n$ for $^{40}$Ca and $^{48}$Ca are found to be similar to that of $^{12}$C, consiste… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.04250v2-abstract-full').style.display = 'inline'; document.getElementById('2111.04250v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.04250v2-abstract-full" style="display: none;"> We report precision determinations of the beam normal single spin asymmetries ($A_n$) in the elastic scattering of 0.95 and 2.18~GeV electrons off $^{12}$C, $^{40}$Ca, $^{48}$Ca, and $^{208}$Pb at very forward angles where the most detailed theoretical calculations have been performed. The first measurements of $A_n$ for $^{40}$Ca and $^{48}$Ca are found to be similar to that of $^{12}$C, consistent with expectations thus demonstrating the validity of theoretical calculations for nuclei with Z~$\leq20$. We also report $A_n$ for $^{208}$Pb at two new momentum transfers (Q$^2$) extending the previous measurement. Our new data confirm the surprising result previously reported, with all three data points showing significant disagreement with the results from the $Z\leq 20$ nuclei. These data confirm our basic understanding of the underlying dynamics that govern $A_n$ for nuclei containing $\lesssim 50$ nucleons, but point to the need for further investigation to understand the unusual $A_n$ behaviour discovered for scattering off $^{208}$Pb. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.04250v2-abstract-full').style.display = 'none'; document.getElementById('2111.04250v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 August, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 2 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett. 128 (2022) 14, 142501 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.04375">arXiv:2109.04375</a> <span> [<a href="https://arxiv.org/pdf/2109.04375">pdf</a>, <a href="https://arxiv.org/format/2109.04375">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Frequency shifts in the EPR spectrum of $^{39}$K due to spin-exchange collisions with polarized $^3$He and precise $^3$He polarimetry </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Katugampola%2C+S">Sumudu Katugampola</a>, <a href="/search/nucl-ex?searchtype=author&query=Jantzi%2C+C">Christopher Jantzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Keder%2C+D+A">David A. Keder</a>, <a href="/search/nucl-ex?searchtype=author&query=Miller%2C+G+W">G. Wilson Miller</a>, <a href="/search/nucl-ex?searchtype=author&query=Nelyubin%2C+V">Vladimir Nelyubin</a>, <a href="/search/nucl-ex?searchtype=author&query=Nguyen%2C+H">Huong Nguyen</a>, <a href="/search/nucl-ex?searchtype=author&query=Tafti%2C+S">Sina Tafti</a>, <a href="/search/nucl-ex?searchtype=author&query=Tobias%2C+W+A">William A. Tobias</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">Gordon D. Cates</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.04375v2-abstract-short" style="display: inline;"> The Zeeman splittings and EPR frequencies of alkali-metal atoms are shifted in the presence of a polarized noble gas. For a spherical geometry, the shift is enhanced over what is expected classically by a dimensionless atomic parameter $魏_0$ that is unique to each alkali-metal atom - noble-gas pair. We present a precise measurement of $魏_0$ for the $^{39}$K-$^3$He system with a relative accuracy o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.04375v2-abstract-full').style.display = 'inline'; document.getElementById('2109.04375v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.04375v2-abstract-full" style="display: none;"> The Zeeman splittings and EPR frequencies of alkali-metal atoms are shifted in the presence of a polarized noble gas. For a spherical geometry, the shift is enhanced over what is expected classically by a dimensionless atomic parameter $魏_0$ that is unique to each alkali-metal atom - noble-gas pair. We present a precise measurement of $魏_0$ for the $^{39}$K-$^3$He system with a relative accuracy of better than 1\%. A critical component of achieving sub-percent accuracy involved characterizing the shape of our samples using both MRI and CT medical-imaging techniques. The parameter $魏_0$ plays an important role in establishing the absolute polarization of $^3$He in a variety of contexts, including polarized targets for electron scattering experiments and MRI of the gas space of the lungs. Our measurement more than doubles the accuracy possible when using $魏_0$ for polarimetry purposes. Just as important, the work presented here represents the first {\it direct} measurement of $魏_0$ for the $^{39}$K-$^3$He system; previous values for $魏_0$ in the $^{39}$K-$^3$He system relied on a chain of measurements that were benchmarked by previous measurements of $魏_0$ in the Rb-$^3$He system. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.04375v2-abstract-full').style.display = 'none'; document.getElementById('2109.04375v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 15 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2107.08133">arXiv:2107.08133</a> <span> [<a href="https://arxiv.org/pdf/2107.08133">pdf</a>, <a href="https://arxiv.org/format/2107.08133">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2022.136878">10.1016/j.physletb.2022.136878 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the Bjorken Sum at very low $Q^2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+P">J. P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Kuhn%2C+S+E">S. E. Kuhn</a>, <a href="/search/nucl-ex?searchtype=author&query=Peng%2C+C">C. Peng</a>, <a href="/search/nucl-ex?searchtype=author&query=Ripani%2C+M">M. Ripani</a>, <a href="/search/nucl-ex?searchtype=author&query=Sulkosky%2C+V">V. Sulkosky</a>, <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+K">K. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Battaglieri%2C+M">M. Battaglieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Burkert%2C+V+D">V. D. Burkert</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Vita%2C+R">R. De Vita</a>, <a href="/search/nucl-ex?searchtype=author&query=Dodge%2C+G+E">G. E. Dodge</a>, <a href="/search/nucl-ex?searchtype=author&query=Fassi%2C+L+E">L. El Fassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Garibaldi%2C+F">F. Garibaldi</a>, <a href="/search/nucl-ex?searchtype=author&query=Kang%2C+H">H. Kang</a>, <a href="/search/nucl-ex?searchtype=author&query=Osipenko%2C+M">M. Osipenko</a>, <a href="/search/nucl-ex?searchtype=author&query=Singh%2C+J+T">J. T. Singh</a>, <a href="/search/nucl-ex?searchtype=author&query=Slifer%2C+K">K. Slifer</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhang%2C+J">J. Zhang</a>, <a href="/search/nucl-ex?searchtype=author&query=Zheng%2C+X">Xiaochao Zheng</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2107.08133v2-abstract-short" style="display: inline;"> We present new data on the Bjorken sum $\overline 螕_1^{p-n}(Q^2)$ at 4-momentum transfer $ 0.021 \leq Q^2 \leq 0.496$ GeV$^2$. The data were obtained in two experiments performed at Jefferson Lab: EG4 on polarized protons and deuterons, and E97110 on polarized $^3$He from which neutron data were extracted. The data cover the domain where chiral effective field theory ($蠂$EFT), the leading effectiv… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.08133v2-abstract-full').style.display = 'inline'; document.getElementById('2107.08133v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2107.08133v2-abstract-full" style="display: none;"> We present new data on the Bjorken sum $\overline 螕_1^{p-n}(Q^2)$ at 4-momentum transfer $ 0.021 \leq Q^2 \leq 0.496$ GeV$^2$. The data were obtained in two experiments performed at Jefferson Lab: EG4 on polarized protons and deuterons, and E97110 on polarized $^3$He from which neutron data were extracted. The data cover the domain where chiral effective field theory ($蠂$EFT), the leading effective theory of the Strong Force at large distances, is expected to be applicable. We find that our data and the predictions from $蠂$EFT are only in marginal agreement. This is somewhat surprising as the contribution from the $螖(1232)$ resonance is suppressed in this observable, which should make it more reliably predicted by $蠂$EFT than quantities in which the $螖$ contribution is important. The data are also compared to a number of phenomenological models with various degrees of agreement. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.08133v2-abstract-full').style.display = 'none'; document.getElementById('2107.08133v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 1 figure. Final version published in Phys. Lett. B</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-21-3468 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Lett. B 825 136878 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.03333">arXiv:2103.03333</a> <span> [<a href="https://arxiv.org/pdf/2103.03333">pdf</a>, <a href="https://arxiv.org/format/2103.03333">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41567-021-01245-9">10.1038/s41567-021-01245-9 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the generalized spin polarizabilities of the neutron in the low $Q^2$ region </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Sulkosky%2C+V">V. Sulkosky</a>, <a href="/search/nucl-ex?searchtype=author&query=Peng%2C+C">C. Peng</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Abrahamyan%2C+S">S. Abrahamyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K+A">K. A. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+S+L">S. L. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Beck%2C+A">A. Beck</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertin%2C+P">P. Bertin</a>, <a href="/search/nucl-ex?searchtype=author&query=Butaru%2C+F">F. Butaru</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chang%2C+C+C">C. C. Chang</a>, <a href="/search/nucl-ex?searchtype=author&query=Choi%2C+S">Seonho Choi</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Coman%2C+L">L. Coman</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Craver%2C+B">B. Craver</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=Denton%2C+J+D">J. D. Denton</a> , et al. (84 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2103.03333v3-abstract-short" style="display: inline;"> Understanding the nucleon spin structure in the regime where the strong interaction becomes truly strong poses a challenge to both experiment and theory. At energy scales below the nucleon mass of about 1 GeV, the intense interaction among the quarks and gluons inside the nucleon makes them highly correlated. Their coherent behaviour causes the emergence of effective degrees of freedom, requiring… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.03333v3-abstract-full').style.display = 'inline'; document.getElementById('2103.03333v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.03333v3-abstract-full" style="display: none;"> Understanding the nucleon spin structure in the regime where the strong interaction becomes truly strong poses a challenge to both experiment and theory. At energy scales below the nucleon mass of about 1 GeV, the intense interaction among the quarks and gluons inside the nucleon makes them highly correlated. Their coherent behaviour causes the emergence of effective degrees of freedom, requiring the application of non-perturbative techniques, such as chiral effective field theory. Here, we present measurements of the neutron's generalized spin-polarizabilities that quantify the neutron's spin precession under electromagnetic fields at very low energy-momentum transfer squared down to 0.035 GeV$^2$. In this regime, chiral effective field theory calculations are expected to be applicable. Our data, however, show a strong discrepancy with these predictions, presenting a challenge to the current description of the neutron's spin properties. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.03333v3-abstract-full').style.display = 'none'; document.getElementById('2103.03333v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">V1: initial version submitted to Nature Physics. V2: Published version. 16 pages, 7 figures. Additional material: 4 data tables (18 pages) V3: Typo corrected in author list. Paper content unchanged</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-21-3312, DOE/OR/23177-5119 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Physics, Vol. 17 687-692 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2102.10767">arXiv:2102.10767</a> <span> [<a href="https://arxiv.org/pdf/2102.10767">pdf</a>, <a href="https://arxiv.org/format/2102.10767">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.126.172502">10.1103/PhysRevLett.126.172502 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Accurate Determination of the Neutron Skin Thickness of $^{208}$Pb through Parity-Violation in Electron Scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Adhikari%2C+D">D. Adhikari</a>, <a href="/search/nucl-ex?searchtype=author&query=Albataineh%2C+H">H. Albataineh</a>, <a href="/search/nucl-ex?searchtype=author&query=Androic%2C+D">D. Androic</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Barcus%2C+S">S. Barcus</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellini%2C+V">V. Bellini</a>, <a href="/search/nucl-ex?searchtype=author&query=Beminiwattha%2C+R+S">R. S. Beminiwattha</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J+F">J. F. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhatt%2C+H">H. Bhatt</a>, <a href="/search/nucl-ex?searchtype=author&query=Pathak%2C+D+B">D. Bhatta Pathak</a>, <a href="/search/nucl-ex?searchtype=author&query=Bhetuwal%2C+D">D. Bhetuwal</a>, <a href="/search/nucl-ex?searchtype=author&query=Blaikie%2C+B">B. Blaikie</a>, <a href="/search/nucl-ex?searchtype=author&query=Campagna%2C+Q">Q. Campagna</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+Y">Y. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Clarke%2C+C">C. Clarke</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Dusa%2C+S+C">S. Covrig Dusa</a>, <a href="/search/nucl-ex?searchtype=author&query=Datta%2C+P">P. Datta</a>, <a href="/search/nucl-ex?searchtype=author&query=Deshpande%2C+A">A. Deshpande</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+D">D. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Feldman%2C+C">C. Feldman</a> , et al. (76 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2102.10767v2-abstract-short" style="display: inline;"> We report a precision measurement of the parity-violating asymmetry $A_{PV}$ in the elastic scattering of longitudinally polarized electrons from $^{208}$Pb. We measure $A_{PV}=550\pm 16 {\rm (stat)}\pm 8\ {\rm (syst)}$ parts per billion, leading to an extraction of the neutral weak form factor $F_W(Q^2 = 0.00616\ {\rm GeV}^2) = 0.368 \pm 0.013$. Combined with our previous measurement, the extract… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.10767v2-abstract-full').style.display = 'inline'; document.getElementById('2102.10767v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2102.10767v2-abstract-full" style="display: none;"> We report a precision measurement of the parity-violating asymmetry $A_{PV}$ in the elastic scattering of longitudinally polarized electrons from $^{208}$Pb. We measure $A_{PV}=550\pm 16 {\rm (stat)}\pm 8\ {\rm (syst)}$ parts per billion, leading to an extraction of the neutral weak form factor $F_W(Q^2 = 0.00616\ {\rm GeV}^2) = 0.368 \pm 0.013$. Combined with our previous measurement, the extracted neutron skin thickness is $R_n-R_p=0.283 \pm 0.071$~fm. The result also yields the first significant direct measurement of the interior weak density of $^{208}$Pb: $蟻^0_W = -0.0796\pm0.0036\ {\rm (exp.)}\pm0.0013\ {\rm (theo.)}\ {\rm fm}^{-3}$ leading to the interior baryon density $蟻^0_b = 0.1480\pm0.0036\ {\rm (exp.)}\pm0.0013\ {\rm (theo.)}\ {\rm fm}^{-3}$. The measurement accurately constrains the density dependence of the symmetry energy of nuclear matter near saturation density, with implications for the size and composition of neutron stars. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.10767v2-abstract-full').style.display = 'none'; document.getElementById('2102.10767v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 126, 172502 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2008.07630">arXiv:2008.07630</a> <span> [<a href="https://arxiv.org/pdf/2008.07630">pdf</a>, <a href="https://arxiv.org/format/2008.07630">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Lattice">hep-lat</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.ppnp.2020.103835">10.1016/j.ppnp.2020.103835 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Diquark Correlations in Hadron Physics: Origin, Impact and Evidence </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Barabanov%2C+M+Y">M. Yu. Barabanov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bedolla%2C+M+A">M. A. Bedolla</a>, <a href="/search/nucl-ex?searchtype=author&query=Brooks%2C+W+K">W. K. Brooks</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+Y">Y. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/nucl-ex?searchtype=author&query=Ding%2C+M">M. Ding</a>, <a href="/search/nucl-ex?searchtype=author&query=Eichmann%2C+G">G. Eichmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Ent%2C+R">R. Ent</a>, <a href="/search/nucl-ex?searchtype=author&query=Ferretti%2C+J">J. Ferretti</a>, <a href="/search/nucl-ex?searchtype=author&query=Gothe%2C+R+W">R. W. Gothe</a>, <a href="/search/nucl-ex?searchtype=author&query=Horn%2C+T">T. Horn</a>, <a href="/search/nucl-ex?searchtype=author&query=Liuti%2C+S">S. Liuti</a>, <a href="/search/nucl-ex?searchtype=author&query=Mezrag%2C+C">C. Mezrag</a>, <a href="/search/nucl-ex?searchtype=author&query=Pilloni%2C+A">A. Pilloni</a>, <a href="/search/nucl-ex?searchtype=author&query=Puckett%2C+A+J+R">A. J. R. Puckett</a>, <a href="/search/nucl-ex?searchtype=author&query=Roberts%2C+C+D">C. D. Roberts</a>, <a href="/search/nucl-ex?searchtype=author&query=Rossi%2C+P">P. Rossi</a>, <a href="/search/nucl-ex?searchtype=author&query=Salme%2C+G">G. Salme</a>, <a href="/search/nucl-ex?searchtype=author&query=Santopinto%2C+E">E. Santopinto</a>, <a href="/search/nucl-ex?searchtype=author&query=Segovia%2C+J">J. Segovia</a>, <a href="/search/nucl-ex?searchtype=author&query=Syritsyn%2C+S+N">S. N. Syritsyn</a>, <a href="/search/nucl-ex?searchtype=author&query=Takizawa%2C+M">M. Takizawa</a>, <a href="/search/nucl-ex?searchtype=author&query=Tomasi-Gustafsson%2C+E">E. Tomasi-Gustafsson</a> , et al. (2 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2008.07630v1-abstract-short" style="display: inline;"> The last decade has seen a marked shift in how the internal structure of hadrons is understood. Modern experimental facilities, new theoretical techniques for the continuum bound-state problem and progress with lattice-regularised QCD have provided strong indications that soft quark+quark (diquark) correlations play a crucial role in hadron physics. For example, theory indicates that the appearanc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2008.07630v1-abstract-full').style.display = 'inline'; document.getElementById('2008.07630v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2008.07630v1-abstract-full" style="display: none;"> The last decade has seen a marked shift in how the internal structure of hadrons is understood. Modern experimental facilities, new theoretical techniques for the continuum bound-state problem and progress with lattice-regularised QCD have provided strong indications that soft quark+quark (diquark) correlations play a crucial role in hadron physics. For example, theory indicates that the appearance of such correlations is a necessary consequence of dynamical chiral symmetry breaking, viz. a corollary of emergent hadronic mass that is responsible for almost all visible mass in the universe; experiment has uncovered signals for such correlations in the flavour-separation of the proton's electromagnetic form factors; and phenomenology suggests that diquark correlations might be critical to the formation of exotic tetra- and penta-quark hadrons. A broad spectrum of such information is evaluated herein, with a view to consolidating the facts and therefrom moving toward a coherent, unified picture of hadron structure and the role that diquark correlations might play. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2008.07630v1-abstract-full').style.display = 'none'; document.getElementById('2008.07630v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 August, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">113 pages, 41 figures, 8 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> NJU-INP 024/20 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1908.05709">arXiv:1908.05709</a> <span> [<a href="https://arxiv.org/pdf/1908.05709">pdf</a>, <a href="https://arxiv.org/format/1908.05709">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2020.135428">10.1016/j.physletb.2020.135428 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the 3He Spin-Structure Functions and of Neutron (3He) Spin-Dependent Sum Rules at 0.035<Q^2<0.24 GeV^2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Sulkosky%2C+V">V. Sulkosky</a>, <a href="/search/nucl-ex?searchtype=author&query=Singh%2C+J+T">J. T. Singh</a>, <a href="/search/nucl-ex?searchtype=author&query=Peng%2C+C">C. Peng</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Abrahamyan%2C+S">S. Abrahamyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K+A">K. A. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+S+L">S. L. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Beck%2C+A">A. Beck</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertin%2C+P">P. Bertin</a>, <a href="/search/nucl-ex?searchtype=author&query=Butaru%2C+F">F. Butaru</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chang%2C+C+C">C. C. Chang</a>, <a href="/search/nucl-ex?searchtype=author&query=Choi%2C+S">Seonho Choi</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Coman%2C+L">L. Coman</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Craver%2C+B">B. Craver</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a> , et al. (84 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1908.05709v2-abstract-short" style="display: inline;"> The spin-structure functions $g_1$ and $g_2$, and the spin-dependent partial cross-section $蟽_\mathrm{TT}$ have been extracted from the polarized cross-sections differences, $螖蟽_{\parallel}\hspace{-0.06cm}\left(谓,Q^{2}\right)$ and $螖蟽_{\perp}\hspace{-0.06cm}\left(谓,Q^{2}\right)$ measured for the $\vec{^\textrm{3}\textrm{He}}(\vec{\textrm{e}},\textrm{e}')\textrm{X}$ reaction, in the E97-110 experim… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.05709v2-abstract-full').style.display = 'inline'; document.getElementById('1908.05709v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1908.05709v2-abstract-full" style="display: none;"> The spin-structure functions $g_1$ and $g_2$, and the spin-dependent partial cross-section $蟽_\mathrm{TT}$ have been extracted from the polarized cross-sections differences, $螖蟽_{\parallel}\hspace{-0.06cm}\left(谓,Q^{2}\right)$ and $螖蟽_{\perp}\hspace{-0.06cm}\left(谓,Q^{2}\right)$ measured for the $\vec{^\textrm{3}\textrm{He}}(\vec{\textrm{e}},\textrm{e}')\textrm{X}$ reaction, in the E97-110 experiment at Jefferson Lab. Polarized electrons with energies from 1.147 to 4.404 GeV were scattered at angles of 6$^{\circ}$ and 9$^{\circ}$ from a longitudinally or transversely polarized $^{3}$He target. The data cover the kinematic regions of the quasi-elastic, resonance production and beyond. From the extracted spin-structure functions, the first moments $\overline{螕_1}\hspace{-0.06cm}\left(Q^{2}\right)$, $螕_2\hspace{-0.06cm}\left(Q^{2}\right)$ and $I_{\mathrm{TT}}\hspace{-0.06cm}\left(Q^{2}\right)$ are evaluated with high precision for the neutron in the $Q^2$ range from 0.035 to 0.24~GeV$^{2}$. The comparison of the data and the chiral effective field theory predictions reveals the importance of proper treatment of the $螖$ degree of freedom for spin observables. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.05709v2-abstract-full').style.display = 'none'; document.getElementById('1908.05709v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 5 figures, 3 tables. Version published in Phys. Lett. B</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-19-3015 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Lett.B 805 135428 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1906.04075">arXiv:1906.04075</a> <span> [<a href="https://arxiv.org/pdf/1906.04075">pdf</a>, <a href="https://arxiv.org/ps/1906.04075">ps</a>, <a href="https://arxiv.org/format/1906.04075">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2019.134875">10.1016/j.physletb.2019.134875 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the single-spin asymmetry $A_y^0$ in quasi-elastic $^3$He$^\uparrow$($e,e'n$) scattering at $0.4 < Q^2 < 1.0$ GeV$/c^2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Long%2C+E">E. Long</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhang%2C+Y+W">Y. W. Zhang</a>, <a href="/search/nucl-ex?searchtype=author&query=Mihoviloviv%2C+M">M. Mihoviloviv</a>, <a href="/search/nucl-ex?searchtype=author&query=Jin%2C+G">G. Jin</a>, <a href="/search/nucl-ex?searchtype=author&query=Sulkosky%2C+V">V. Sulkosky</a>, <a href="/search/nucl-ex?searchtype=author&query=Kelleher%2C+A">A. Kelleher</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+B">B. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Higinbotham%2C+D+W">D. W. Higinbotham</a>, <a href="/search/nucl-ex?searchtype=author&query=Sirca%2C+S">S. Sirca</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J+R+M">J. R. M. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradshaw%2C+P">P. Bradshaw</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a>, <a href="/search/nucl-ex?searchtype=author&query=Deng%2C+X">X. Deng</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+C">C. Dutta</a> , et al. (66 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1906.04075v1-abstract-short" style="display: inline;"> Due to the lack of free neutron targets, studies of the structure of the neutron are typically made by scattering electrons from either $^2$H or $^3$He targets. In order to extract useful neutron information from a $^3$He target, one must understand how the neutron in a $^3$He system differs from a free neutron by taking into account nuclear effects such as final state interactions and meson excha… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.04075v1-abstract-full').style.display = 'inline'; document.getElementById('1906.04075v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1906.04075v1-abstract-full" style="display: none;"> Due to the lack of free neutron targets, studies of the structure of the neutron are typically made by scattering electrons from either $^2$H or $^3$He targets. In order to extract useful neutron information from a $^3$He target, one must understand how the neutron in a $^3$He system differs from a free neutron by taking into account nuclear effects such as final state interactions and meson exchange currents. The target single spin asymmetry $A_y^0$ is an ideal probe of such effects, as any deviation from zero indicates effects beyond plane wave impulse approximation. New measurements of the target single spin asymmetry $A_y^0$ at $Q^2$ of 0.46 and 0.96 (GeV/$c)^2$ were made at Jefferson Lab using the quasi-elastic $^3\mathrm{He}^{\uparrow}(e,e'n)$ reaction. Our measured asymmetry decreases rapidly, from $>20\%$ at $Q^2=0.46$ (GeV/$c)^2$ to nearly zero at $Q^2=0.96$ (GeV$/c)^2$, demonstrating the fall-off of the reaction mechanism effects as $Q^2$ increases. We also observed a small $蔚$-dependent increase in $A_y^0$ compared to previous measurements, particularly at moderate $Q^2$. This indicates that upcoming high $Q^2$ measurements from the Jefferson Lab 12 GeV program can cleanly probe neutron structure from polarized $^3$He using plane wave impulse approximation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.04075v1-abstract-full').style.display = 'none'; document.getElementById('1906.04075v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-19-2949 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1804.06043">arXiv:1804.06043</a> <span> [<a href="https://arxiv.org/pdf/1804.06043">pdf</a>, <a href="https://arxiv.org/format/1804.06043">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2018.10.063">10.1016/j.physletb.2018.10.063 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of double-polarization asymmetries in the quasi-elastic $^3\vec{\mathrm{He}}(\vec{\mathrm{e}},\mathrm{e}'\mathrm{p})$ process </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Mihovilovi%C4%8D%2C+M">M. Mihovilovi膷</a>, <a href="/search/nucl-ex?searchtype=author&query=Jin%2C+G">G. Jin</a>, <a href="/search/nucl-ex?searchtype=author&query=Long%2C+E">E. Long</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhang%2C+Y+-">Y. -W. Zhang</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+B">B. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J+R+M">J. R. M. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradshaw%2C+P">P. Bradshaw</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+P">J. P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a>, <a href="/search/nucl-ex?searchtype=author&query=Deng%2C+X">X. Deng</a>, <a href="/search/nucl-ex?searchtype=author&query=Deltuva%2C+A">A. Deltuva</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+C">C. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Fassi%2C+L+E">L. El Fassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Flay%2C+D">D. Flay</a>, <a href="/search/nucl-ex?searchtype=author&query=Frullani%2C+S">S. Frullani</a> , et al. (77 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1804.06043v1-abstract-short" style="display: inline;"> We report on a precise measurement of double-polarization asymmetries in electron-induced breakup of $^3\mathrm{He}$ proceeding to $\mathrm{pd}$ and $\mathrm{ppn}$ final states, performed in quasi-elastic kinematics at $Q^2 = 0.25\,(\mathrm{GeV}/c)^2$ for missing momenta up to $250\,\mathrm{MeV}/c$. These observables represent highly sensitive tools to investigate the electromagnetic and spin stru… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.06043v1-abstract-full').style.display = 'inline'; document.getElementById('1804.06043v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1804.06043v1-abstract-full" style="display: none;"> We report on a precise measurement of double-polarization asymmetries in electron-induced breakup of $^3\mathrm{He}$ proceeding to $\mathrm{pd}$ and $\mathrm{ppn}$ final states, performed in quasi-elastic kinematics at $Q^2 = 0.25\,(\mathrm{GeV}/c)^2$ for missing momenta up to $250\,\mathrm{MeV}/c$. These observables represent highly sensitive tools to investigate the electromagnetic and spin structure of $^3\mathrm{He}$ and the relative importance of two- and three-body effects involved in the breakup reaction dynamics. The measured asymmetries cannot be satisfactorily reproduced by state-of-the-art calculations of $^3\mathrm{He}$ unless their three-body segment is adjusted, indicating that the spin-dependent part of the nuclear interaction governing the three-body breakup process is much smaller than previously thought. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.06043v1-abstract-full').style.display = 'none'; document.getElementById('1804.06043v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 3 figures, submitted to Phys. Rev. Lett</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-18-2681 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Lett. B 788 (2019) 117 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1704.06253">arXiv:1704.06253</a> <span> [<a href="https://arxiv.org/pdf/1704.06253">pdf</a>, <a href="https://arxiv.org/format/1704.06253">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.96.065206">10.1103/PhysRevC.96.065206 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Extraction of the Neutron Electric Form Factor from Measurements of Inclusive Double Spin Asymmetries </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Sulkosky%2C+V">V. Sulkosky</a>, <a href="/search/nucl-ex?searchtype=author&query=Jin%2C+G">G. Jin</a>, <a href="/search/nucl-ex?searchtype=author&query=Long%2C+E">E. Long</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhang%2C+Y+W">Y. W. Zhang</a>, <a href="/search/nucl-ex?searchtype=author&query=Mihovilovic%2C+M">M. Mihovilovic</a>, <a href="/search/nucl-ex?searchtype=author&query=Kelleher%2C+A">A. Kelleher</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+B">B. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Higinbotham%2C+D+W">D. W. Higinbotham</a>, <a href="/search/nucl-ex?searchtype=author&query=Sirca%2C+S">S. Sirca</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J+R+M">J. R. M. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradshaw%2C+P">P. Bradshaw</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a>, <a href="/search/nucl-ex?searchtype=author&query=Deng%2C+X">X. Deng</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+C">C. Dutta</a> , et al. (67 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1704.06253v2-abstract-short" style="display: inline;"> $[Background]$ Measurements of the neutron charge form factor, $G^n_E$, are challenging due to the fact that the neutron has no net charge. In addition, measurements of the neutron form factors must use nuclear targets which require accurately accounting for nuclear effects. Extracting $G^n_E$ with different targets and techniques provides an important test of our handling of these effects. $[Purp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.06253v2-abstract-full').style.display = 'inline'; document.getElementById('1704.06253v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1704.06253v2-abstract-full" style="display: none;"> $[Background]$ Measurements of the neutron charge form factor, $G^n_E$, are challenging due to the fact that the neutron has no net charge. In addition, measurements of the neutron form factors must use nuclear targets which require accurately accounting for nuclear effects. Extracting $G^n_E$ with different targets and techniques provides an important test of our handling of these effects. $[Purpose]$ The goal of the measurement was to use an inclusive asymmetry measurement technique to extract the neutron charge form factor at a four-momentum transfer of $1~(\rm{GeV/c})^2$. This technique has very different systematic uncertainties than traditional exclusive measurements and thus serves as an independent check of whether nuclear effects have been taken into account correctly. $[Method]$ The inclusive quasi-elastic reaction $^3\overrightarrow{\rm{He}}(\overrightarrow{e},e')$ was measured at Jefferson Lab. The neutron electric form factor, $G_E^n$, was extracted at $Q^2 = 0.98~(\rm{GeV/c})^2$ from ratios of electron-polarization asymmetries measured for two orthogonal target spin orientations. This $Q^2$ is high enough that the sensitivity to $G_E^n$ is not overwhelmed by the neutron magnetic contribution, and yet low enough that explicit neutron detection is not required to suppress pion production. $[Results]$ The neutron electric form factor, $G_E^n$, was determined to be $0.0414\pm0.0077\;{(stat)}\pm0.0022\;{(syst)}$; providing the first high precision inclusive extraction of the neutron's charge form factor. $[Conclusions]$ The use of the inclusive quasi-elastic $^3\overrightarrow{\rm{He}}(\overrightarrow{e},e')$ with a four-momentum transfer near $1~(\rm{GeV/c})^2$ has been used to provide a unique measurement of $G^n_E$. This new result provides a systematically independent validation of the exclusive extraction technique results. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.06253v2-abstract-full').style.display = 'none'; document.getElementById('1704.06253v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 November, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 2 figures, 2 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-17-2480 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 96, 065206 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1610.06083">arXiv:1610.06083</a> <span> [<a href="https://arxiv.org/pdf/1610.06083">pdf</a>, <a href="https://arxiv.org/format/1610.06083">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2017.01.026">10.1016/j.physletb.2017.01.026 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A novel comparison of M酶ller and Compton electron-beam polarimeters </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Magee%2C+J+A">J. A. Magee</a>, <a href="/search/nucl-ex?searchtype=author&query=Narayan%2C+A">A. Narayan</a>, <a href="/search/nucl-ex?searchtype=author&query=Jones%2C+D">D. Jones</a>, <a href="/search/nucl-ex?searchtype=author&query=Beminiwattha%2C+R">R. Beminiwattha</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+D">D. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Gaskell%2C+D">D. Gaskell</a>, <a href="/search/nucl-ex?searchtype=author&query=Martin%2C+J+W">J. W. Martin</a>, <a href="/search/nucl-ex?searchtype=author&query=Paschke%2C+K+D">K. D. Paschke</a>, <a href="/search/nucl-ex?searchtype=author&query=Tvaskis%2C+V">V. Tvaskis</a>, <a href="/search/nucl-ex?searchtype=author&query=Asaturyan%2C+A">A. Asaturyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G">G. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Cavness%2C+B+S">B. S. Cavness</a>, <a href="/search/nucl-ex?searchtype=author&query=Dillon-Townes%2C+L+A">L. A. Dillon-Townes</a>, <a href="/search/nucl-ex?searchtype=author&query=Hays%2C+G">G. Hays</a>, <a href="/search/nucl-ex?searchtype=author&query=Hoskins%2C+J">J. Hoskins</a>, <a href="/search/nucl-ex?searchtype=author&query=Ihloff%2C+E">E. Ihloff</a>, <a href="/search/nucl-ex?searchtype=author&query=Jones%2C+R">R. Jones</a>, <a href="/search/nucl-ex?searchtype=author&query=King%2C+P+M">P. M. King</a>, <a href="/search/nucl-ex?searchtype=author&query=Kowalski%2C+S">S. Kowalski</a>, <a href="/search/nucl-ex?searchtype=author&query=Kurchaninov%2C+L">L. Kurchaninov</a>, <a href="/search/nucl-ex?searchtype=author&query=Lee%2C+L">L. Lee</a> , et al. (16 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1610.06083v2-abstract-short" style="display: inline;"> We have performed a novel comparison between electron-beam polarimeters based on M酶ller and Compton scattering. A sequence of electron-beam polarization measurements were performed at low beam currents ($<$ 5 $渭$A) during the $Q_{\rm weak}$ experiment in Hall C at Jefferson Lab. These low current measurements were bracketed by the regular high current (180 $渭$A) operation of the Compton polarimete… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.06083v2-abstract-full').style.display = 'inline'; document.getElementById('1610.06083v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1610.06083v2-abstract-full" style="display: none;"> We have performed a novel comparison between electron-beam polarimeters based on M酶ller and Compton scattering. A sequence of electron-beam polarization measurements were performed at low beam currents ($<$ 5 $渭$A) during the $Q_{\rm weak}$ experiment in Hall C at Jefferson Lab. These low current measurements were bracketed by the regular high current (180 $渭$A) operation of the Compton polarimeter. All measurements were found to be consistent within experimental uncertainties of 1% or less, demonstrating that electron polarization does not depend significantly on the beam current. This result lends confidence to the common practice of applying M酶ller measurements made at low beam currents to physics experiments performed at higher beam currents. The agreement between two polarimetry techniques based on independent physical processes sets an important benchmark for future precision asymmetry measurements that require sub-1% precision in polarimetry. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.06083v2-abstract-full').style.display = 'none'; document.getElementById('1610.06083v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 January, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2016. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1610.02350">arXiv:1610.02350</a> <span> [<a href="https://arxiv.org/pdf/1610.02350">pdf</a>, <a href="https://arxiv.org/ps/1610.02350">ps</a>, <a href="https://arxiv.org/format/1610.02350">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.95.035209">10.1103/PhysRevC.95.035209 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First measurement of unpolarized SIDIS cross section and cross section ratios from a $^3$He target </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Yan%2C+X">X. Yan</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J+R+M">J. R. M. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradshaw%2C+P+C">P. C. Bradshaw</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+W">W. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chirapatpimol%2C+K">K. Chirapatpimol</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a>, <a href="/search/nucl-ex?searchtype=author&query=Deng%2C+X">X. Deng</a> , et al. (93 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1610.02350v2-abstract-short" style="display: inline;"> The unpolarized semi-inclusive deep-inelastic scattering (SIDIS) differential cross sections in $^3$He($e,e^{\prime}蟺^{\pm}$)$X$ have been measured for the first time in Jefferson Lab experiment E06-010 performed with a $5.9\,$GeV $e^-$ beam on a $^3$He target. The experiment focuses on the valence quark region, covering a kinematic range $0.12 < x_{bj} < 0.45$,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.02350v2-abstract-full').style.display = 'inline'; document.getElementById('1610.02350v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1610.02350v2-abstract-full" style="display: none;"> The unpolarized semi-inclusive deep-inelastic scattering (SIDIS) differential cross sections in $^3$He($e,e^{\prime}蟺^{\pm}$)$X$ have been measured for the first time in Jefferson Lab experiment E06-010 performed with a $5.9\,$GeV $e^-$ beam on a $^3$He target. The experiment focuses on the valence quark region, covering a kinematic range $0.12 < x_{bj} < 0.45$, $1 < Q^2 < 4 \, \textrm{(GeV/c)}^2$, $0.45 < z_{h} < 0.65$, and $0.05 < P_t < 0.55 \, \textrm{GeV/c}$. The extracted SIDIS differential cross sections of $蟺^{\pm}$ production are compared with existing phenomenological models while the $^3$He nucleus approximated as two protons and one neutron in a plane wave picture, in multi-dimensional bins. Within the experimental uncertainties, the azimuthal modulations of the cross sections are found to be consistent with zero. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.02350v2-abstract-full').style.display = 'none'; document.getElementById('1610.02350v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 November, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 95, 035209 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1603.03612">arXiv:1603.03612</a> <span> [<a href="https://arxiv.org/pdf/1603.03612">pdf</a>, <a href="https://arxiv.org/ps/1603.03612">ps</a>, <a href="https://arxiv.org/format/1603.03612">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.94.052003">10.1103/PhysRevD.94.052003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of $d_{2}^{n}$ and $A_{1}^{n}$: Probing the neutron spin structure </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Flay%2C+D">D. Flay</a>, <a href="/search/nucl-ex?searchtype=author&query=Posik%2C+M">M. Posik</a>, <a href="/search/nucl-ex?searchtype=author&query=Parno%2C+D+S">D. S. Parno</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W">W. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=Deng%2C+X">X. Deng</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+C">C. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Fassi%2C+L+E">L. El Fassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Franklin%2C+G+B">G. B. Franklin</a>, <a href="/search/nucl-ex?searchtype=author&query=Friend%2C+M">M. Friend</a> , et al. (66 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1603.03612v3-abstract-short" style="display: inline;"> We report on the results of the E06-014 experiment performed at Jefferson Lab in Hall A, where a precision measurement of the twist-3 matrix element $d_2$ of the neutron ($d_{2}^{n}$) was conducted. This quantity represents the average color Lorentz force a struck quark experiences in a deep inelastic electron scattering event off a neutron due to its interaction with the hadronizing remnants. Thi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.03612v3-abstract-full').style.display = 'inline'; document.getElementById('1603.03612v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1603.03612v3-abstract-full" style="display: none;"> We report on the results of the E06-014 experiment performed at Jefferson Lab in Hall A, where a precision measurement of the twist-3 matrix element $d_2$ of the neutron ($d_{2}^{n}$) was conducted. This quantity represents the average color Lorentz force a struck quark experiences in a deep inelastic electron scattering event off a neutron due to its interaction with the hadronizing remnants. This color force was determined from a linear combination of the third moments of the spin structure functions $g_1$ and $g_2$ on $^{3}$He after nuclear corrections had been applied to these moments. The kinematics included two average $Q^{2}$ bins of $3.2$ GeV$^{2}$ and $4.3$ GeV$^{2}$, and Bjorken-$x$ $0.25 \leq x \leq 0.90$ covering the DIS and resonance regions. We found $d_2^n$ to be small and negative for $<Q^{2}> = 3.2$ GeV$^{2}$, and smaller for $<Q^{2}> = 4.3$ GeV$^{2}$, consistent with a lattice QCD calculation. The twist-4 matrix element $f_{2}^{n}$ was extracted by combining our $d_{2}^{n}$ with the world data on $螕_{1}^{n} = \int_{0}^{1} g_{1}^{n} dx$. We found $f_{2}^{n}$ to be roughly an order of magnitude larger than $d_{2}^{n}$. Utilizing the extracted $d_{2}^{n}$ and $f_{2}^{n}$ data, we separated the color force into its electric and magnetic components, $F_{E}^{y,n}$ and $F_{B}^{y,n}$, and found them to be equal and opposite in magnitude, in agreement with instanton model predictions but not with those from QCD sum rules. Additionally, we have extracted the neutron virtual photon-nucleon asymmetry $A_{1}^{n}$, the structure function ratio $g_{1}^{n}/F_{1}^{n}$, and the quark ratios $(螖u + 螖\bar{u})/(u + \bar{u})$ and $(螖d + 螖\bar{d})/(d + \bar{d})$. These results were found to be consistent with DIS world data and with the prediction of the constituent quark model but at odds with those of perturbative QCD at large $x$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.03612v3-abstract-full').style.display = 'none'; document.getElementById('1603.03612v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 June, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 March, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">55 Pages, 45 figures, 48 tables. 15 supplemental files. Grammatical and typo fixes. Revised some model descriptions and updated analyses for f_2^n and color forces</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 94, 052003 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1601.00251">arXiv:1601.00251</a> <span> [<a href="https://arxiv.org/pdf/1601.00251">pdf</a>, <a href="https://arxiv.org/format/1601.00251">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2016.03.085">10.1016/j.nima.2016.03.085 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A high-finesse Fabry-Perot cavity with a frequency-doubled green laser for precision Compton polarimetry at Jefferson Lab </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Rakhman%2C+A">A. Rakhman</a>, <a href="/search/nucl-ex?searchtype=author&query=Hafez%2C+M">M. Hafez</a>, <a href="/search/nucl-ex?searchtype=author&query=Nanda%2C+S">S. Nanda</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Franklin%2C+G+B">G. B. Franklin</a>, <a href="/search/nucl-ex?searchtype=author&query=Friend%2C+M">M. Friend</a>, <a href="/search/nucl-ex?searchtype=author&query=Michaels%2C+R+W">R. W. Michaels</a>, <a href="/search/nucl-ex?searchtype=author&query=Nelyubin%2C+V">V. Nelyubin</a>, <a href="/search/nucl-ex?searchtype=author&query=Parno%2C+D+S">D. S. Parno</a>, <a href="/search/nucl-ex?searchtype=author&query=Paschke%2C+K+D">K. D. Paschke</a>, <a href="/search/nucl-ex?searchtype=author&query=Quinn%2C+B+P">B. P. Quinn</a>, <a href="/search/nucl-ex?searchtype=author&query=Souder%2C+P+A">P. A. Souder</a>, <a href="/search/nucl-ex?searchtype=author&query=Tobias%2C+W+A">W. A. Tobias</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1601.00251v2-abstract-short" style="display: inline;"> A high-finesse Fabry-Perot cavity with a frequency-doubled continuous wave green laser (532~nm) has been built and installed in Hall A of Jefferson Lab for high precision Compton polarimetry. The infrared (1064~nm) beam from a ytterbium-doped fiber amplifier seeded by a Nd:YAG nonplanar ring oscillator laser is frequency doubled in a single-pass periodically poled MgO:LiNbO$_{3}$ crystal. The maxi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.00251v2-abstract-full').style.display = 'inline'; document.getElementById('1601.00251v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1601.00251v2-abstract-full" style="display: none;"> A high-finesse Fabry-Perot cavity with a frequency-doubled continuous wave green laser (532~nm) has been built and installed in Hall A of Jefferson Lab for high precision Compton polarimetry. The infrared (1064~nm) beam from a ytterbium-doped fiber amplifier seeded by a Nd:YAG nonplanar ring oscillator laser is frequency doubled in a single-pass periodically poled MgO:LiNbO$_{3}$ crystal. The maximum achieved green power at 5 W IR pump power is 1.74 W with a total conversion efficiency of 34.8\%. The green beam is injected into the optical resonant cavity and enhanced up to 3.7~kW with a corresponding enhancement of 3800. The polarization transfer function has been measured in order to determine the intra-cavity circular laser polarization within a measurement uncertainty of 0.7\%. The PREx experiment at Jefferson Lab used this system for the first time and achieved 1.0\% precision in polarization measurements of an electron beam with energy and current of 1.0~GeV and 50~$渭$A. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.00251v2-abstract-full').style.display = 'none'; document.getElementById('1601.00251v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 March, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 January, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">20 pages, 22 figures, revised version of arXiv:1601.00251v1, submitted to NIMA</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1509.06642">arXiv:1509.06642</a> <span> [<a href="https://arxiv.org/pdf/1509.06642">pdf</a>, <a href="https://arxiv.org/format/1509.06642">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevX.6.011013">10.1103/PhysRevX.6.011013 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Precision Electron-Beam Polarimetry using Compton Scattering at 1 GeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Narayan%2C+A">A. Narayan</a>, <a href="/search/nucl-ex?searchtype=author&query=Jones%2C+D">D. Jones</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+D">D. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Gaskell%2C+D">D. Gaskell</a>, <a href="/search/nucl-ex?searchtype=author&query=Martin%2C+J+W">J. W. Martin</a>, <a href="/search/nucl-ex?searchtype=author&query=Paschke%2C+K+D">K. D. Paschke</a>, <a href="/search/nucl-ex?searchtype=author&query=Tvaskis%2C+V">V. Tvaskis</a>, <a href="/search/nucl-ex?searchtype=author&query=Asaturyan%2C+A">A. Asaturyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G">G. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Cavness%2C+B+S">B. S. Cavness</a>, <a href="/search/nucl-ex?searchtype=author&query=Dillon-Townes%2C+L+A">L. A. Dillon-Townes</a>, <a href="/search/nucl-ex?searchtype=author&query=Hays%2C+G">G. Hays</a>, <a href="/search/nucl-ex?searchtype=author&query=Ihloff%2C+E">E. Ihloff</a>, <a href="/search/nucl-ex?searchtype=author&query=Jones%2C+R">R. Jones</a>, <a href="/search/nucl-ex?searchtype=author&query=Kowalski%2C+S">S. Kowalski</a>, <a href="/search/nucl-ex?searchtype=author&query=Kurchaninov%2C+L">L. Kurchaninov</a>, <a href="/search/nucl-ex?searchtype=author&query=Lee%2C+L">L. Lee</a>, <a href="/search/nucl-ex?searchtype=author&query=McCreary%2C+A">A. McCreary</a>, <a href="/search/nucl-ex?searchtype=author&query=McDonald%2C+M">M. McDonald</a>, <a href="/search/nucl-ex?searchtype=author&query=Micherdzinska%2C+A">A. Micherdzinska</a>, <a href="/search/nucl-ex?searchtype=author&query=Mkrtchyan%2C+A">A. Mkrtchyan</a> , et al. (11 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1509.06642v2-abstract-short" style="display: inline;"> We report on the highest precision yet achieved in the measurement of the polarization of a low energy, $\mathcal{O}$(1 GeV), electron beam, accomplished using a new polarimeter based on electron-photon scattering, in Hall~C at Jefferson Lab. A number of technical innovations were necessary, including a novel method for precise control of the laser polarization in a cavity and a novel diamond micr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.06642v2-abstract-full').style.display = 'inline'; document.getElementById('1509.06642v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1509.06642v2-abstract-full" style="display: none;"> We report on the highest precision yet achieved in the measurement of the polarization of a low energy, $\mathcal{O}$(1 GeV), electron beam, accomplished using a new polarimeter based on electron-photon scattering, in Hall~C at Jefferson Lab. A number of technical innovations were necessary, including a novel method for precise control of the laser polarization in a cavity and a novel diamond micro-strip detector which was able to capture most of the spectrum of scattered electrons. The data analysis technique exploited track finding, the high granularity of the detector and its large acceptance. The polarization of the $180~渭$A, $1.16$~GeV electron beam was measured with a statistical precision of $<$~1\% per hour and a systematic uncertainty of 0.59\%. This exceeds the level of precision required by the \qweak experiment, a measurement of the vector weak charge of the proton. Proposed future low-energy experiments require polarization uncertainty $<$~0.4\%, and this result represents an important demonstration of that possibility. This measurement is also the first use of diamond detectors for particle tracking in an experiment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.06642v2-abstract-full').style.display = 'none'; document.getElementById('1509.06642v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 February, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 September, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 7 figures, published in PRX</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. X 6, 011013 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1502.02636">arXiv:1502.02636</a> <span> [<a href="https://arxiv.org/pdf/1502.02636">pdf</a>, <a href="https://arxiv.org/format/1502.02636">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.115.172502">10.1103/PhysRevLett.115.172502 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the Target-Normal Single-Spin Asymmetry in Quasi-Elastic Scattering from the Reaction $^3$He$^\uparrow(e,e^\prime)$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Zhang%2C+Y+-">Y. -W. Zhang</a>, <a href="/search/nucl-ex?searchtype=author&query=Long%2C+E">E. Long</a>, <a href="/search/nucl-ex?searchtype=author&query=Mihovilovi%C4%8D%2C+M">M. Mihovilovi膷</a>, <a href="/search/nucl-ex?searchtype=author&query=Jin%2C+G">G. Jin</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+B">B. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J+R+M">J. R. M. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradshaw%2C+P">P. Bradshaw</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+P">J. P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a>, <a href="/search/nucl-ex?searchtype=author&query=Deng%2C+X">X. Deng</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+C">C. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Fassi%2C+L+E">L. El Fassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Flay%2C+D">D. Flay</a>, <a href="/search/nucl-ex?searchtype=author&query=Frullani%2C+S">S. Frullani</a>, <a href="/search/nucl-ex?searchtype=author&query=Garibaldi%2C+F">F. Garibaldi</a>, <a href="/search/nucl-ex?searchtype=author&query=Gao%2C+H">H. Gao</a> , et al. (67 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1502.02636v1-abstract-short" style="display: inline;"> We report the first measurement of the target single-spin asymmetry, $A_y$, in quasi-elastic scattering from the inclusive reaction $^3$He$^{\uparrow}(e,e^\prime)$ on a $^3$He gas target polarized normal to the lepton scattering plane. Assuming time-reversal invariance, this asymmetry is strictly zero for one-photon exchange. A non-zero $A_y$ can arise from the interference between the one- and tw… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.02636v1-abstract-full').style.display = 'inline'; document.getElementById('1502.02636v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1502.02636v1-abstract-full" style="display: none;"> We report the first measurement of the target single-spin asymmetry, $A_y$, in quasi-elastic scattering from the inclusive reaction $^3$He$^{\uparrow}(e,e^\prime)$ on a $^3$He gas target polarized normal to the lepton scattering plane. Assuming time-reversal invariance, this asymmetry is strictly zero for one-photon exchange. A non-zero $A_y$ can arise from the interference between the one- and two-photon exchange processes which is sensitive to the details of the sub-structure of the nucleon. An experiment recently completed at Jefferson Lab yielded asymmetries with high statistical precision at $Q^{2}=$ 0.13, 0.46 and 0.97 GeV$^{2}$. These measurements demonstrate, for the first time, that the $^3$He asymmetry is clearly non-zero and negative with a statistical significance of (8-10)$蟽$. Using measured proton-to-$^{3}$He cross-section ratios and the effective polarization approximation, neutron asymmetries of $-$(1-3)% were obtained. The neutron asymmetry at high $Q^2$ is related to moments of the Generalized Parton Distributions (GPDs). Our measured neutron asymmetry at $Q^2=0.97$ GeV$^2$ agrees well with a prediction based on two-photon exchange using a GPD model and thus provides a new, independent constraint on these distributions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.02636v1-abstract-full').style.display = 'none'; document.getElementById('1502.02636v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 February, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 115, 172502 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1502.01394">arXiv:1502.01394</a> <span> [<a href="https://arxiv.org/pdf/1502.01394">pdf</a>, <a href="https://arxiv.org/ps/1502.01394">ps</a>, <a href="https://arxiv.org/format/1502.01394">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.92.015207">10.1103/PhysRevC.92.015207 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Double Spin Asymmetries of Inclusive Hadron Electroproductions from a Transversely Polarized $^3\rm{He}$ Target </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=The+Jefferson+Lab+Hall+A+Collaboration"> The Jefferson Lab Hall A Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhao%2C+Y+X">Y. X. Zhao</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J+R+M">J. R. M. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradshaw%2C+P+C">P. C. Bradshaw</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+W">W. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chirapatpimol%2C+K">K. Chirapatpimol</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M">M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a> , et al. (92 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1502.01394v2-abstract-short" style="display: inline;"> We report the measurement of beam-target double-spin asymmetries ($A_\text{LT}$) in the inclusive production of identified hadrons, $\vec{e}~$+$~^3\text{He}^{\uparrow}\rightarrow h+X$, using a longitudinally polarized 5.9 GeV electron beam and a transversely polarized $^3\rm{He}$ target. Hadrons ($蟺^{\pm}$, $K^{\pm}$ and proton) were detected at 16$^{\circ}$ with an average momentum $<$$P_h$$>$=2.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.01394v2-abstract-full').style.display = 'inline'; document.getElementById('1502.01394v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1502.01394v2-abstract-full" style="display: none;"> We report the measurement of beam-target double-spin asymmetries ($A_\text{LT}$) in the inclusive production of identified hadrons, $\vec{e}~$+$~^3\text{He}^{\uparrow}\rightarrow h+X$, using a longitudinally polarized 5.9 GeV electron beam and a transversely polarized $^3\rm{He}$ target. Hadrons ($蟺^{\pm}$, $K^{\pm}$ and proton) were detected at 16$^{\circ}$ with an average momentum $<$$P_h$$>$=2.35 GeV/c and a transverse momentum ($p_{T}$) coverage from 0.60 to 0.68 GeV/c. Asymmetries from the $^3\text{He}$ target were observed to be non-zero for $蟺^{\pm}$ production when the target was polarized transversely in the horizontal plane. The $蟺^{+}$ and $蟺^{-}$ asymmetries have opposite signs, analogous to the behavior of $A_\text{LT}$ in semi-inclusive deep-inelastic scattering. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1502.01394v2-abstract-full').style.display = 'none'; document.getElementById('1502.01394v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 July, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 February, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Published in PRC (92.015207), nuclear experiment, high-energy experiment</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> PhysRevC.92.015207,2015 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1411.4088">arXiv:1411.4088</a> <span> [<a href="https://arxiv.org/pdf/1411.4088">pdf</a>, <a href="https://arxiv.org/format/1411.4088">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> </div> <p class="title is-5 mathjax"> The MOLLER Experiment: An Ultra-Precise Measurement of the Weak Mixing Angle Using M酶ller Scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=MOLLER+Collaboration"> MOLLER Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Brindza%2C+P">P. Brindza</a>, <a href="/search/nucl-ex?searchtype=author&query=Carlini%2C+R+D">R. D. Carlini</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J">J-P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Covrig%2C+S">S. Covrig</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Gaskell%2C+D">D. Gaskell</a>, <a href="/search/nucl-ex?searchtype=author&query=Gavalya%2C+A">A. Gavalya</a>, <a href="/search/nucl-ex?searchtype=author&query=Gomez%2C+J">J. Gomez</a>, <a href="/search/nucl-ex?searchtype=author&query=Higinbotham%2C+D+W">D. W. Higinbotham</a>, <a href="/search/nucl-ex?searchtype=author&query=Keppel%2C+C">C. Keppel</a>, <a href="/search/nucl-ex?searchtype=author&query=Meekins%2C+D">D. Meekins</a>, <a href="/search/nucl-ex?searchtype=author&query=Michaels%2C+R">R. Michaels</a>, <a href="/search/nucl-ex?searchtype=author&query=Moffit%2C+B">B. Moffit</a>, <a href="/search/nucl-ex?searchtype=author&query=Roblin%2C+Y">Y. Roblin</a>, <a href="/search/nucl-ex?searchtype=author&query=Suleiman%2C+R">R. Suleiman</a>, <a href="/search/nucl-ex?searchtype=author&query=Wines%2C+R">R. Wines</a>, <a href="/search/nucl-ex?searchtype=author&query=Wojtsekhowski%2C+B">B. Wojtsekhowski</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G">G. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Crabb%2C+D">D. Crabb</a>, <a href="/search/nucl-ex?searchtype=author&query=Day%2C+D">D. Day</a>, <a href="/search/nucl-ex?searchtype=author&query=Gnanvo%2C+K">K. Gnanvo</a> , et al. (100 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1411.4088v2-abstract-short" style="display: inline;"> The physics case and an experimental overview of the MOLLER (Measurement Of a Lepton Lepton Electroweak Reaction) experiment at the 12 GeV upgraded Jefferson Lab are presented. A highlight of the Fundamental Symmetries subfield of the 2007 NSAC Long Range Plan was the SLAC E158 measurement of the parity-violating asymmetry $A_{PV}$ in polarized electron-electron (M酶ller) scattering. The proposed M… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1411.4088v2-abstract-full').style.display = 'inline'; document.getElementById('1411.4088v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1411.4088v2-abstract-full" style="display: none;"> The physics case and an experimental overview of the MOLLER (Measurement Of a Lepton Lepton Electroweak Reaction) experiment at the 12 GeV upgraded Jefferson Lab are presented. A highlight of the Fundamental Symmetries subfield of the 2007 NSAC Long Range Plan was the SLAC E158 measurement of the parity-violating asymmetry $A_{PV}$ in polarized electron-electron (M酶ller) scattering. The proposed MOLLER experiment will improve on this result by a factor of five, yielding the most precise measurement of the weak mixing angle at low or high energy anticipated over the next decade. This new result would be sensitive to the interference of the electromagnetic amplitude with new neutral current amplitudes as weak as $\sim 10^{-3}\cdot G_F$ from as yet undiscovered dynamics beyond the Standard Model. The resulting discovery reach is unmatched by any proposed experiment measuring a flavor- and CP-conserving process over the next decade, and yields a unique window to new physics at MeV and multi-TeV scales, complementary to direct searches at high energy colliders such as the Large Hadron Collider (LHC). The experiment takes advantage of the unique opportunity provided by the upgraded electron beam energy, luminosity, and stability at Jefferson Laboratory and the extensive experience accumulated in the community after a round of recent successfully completed parity-violating electron scattering experiments <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1411.4088v2-abstract-full').style.display = 'none'; document.getElementById('1411.4088v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 December, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 November, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2014. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1411.3200">arXiv:1411.3200</a> <span> [<a href="https://arxiv.org/pdf/1411.3200">pdf</a>, <a href="https://arxiv.org/ps/1411.3200">ps</a>, <a href="https://arxiv.org/format/1411.3200">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.91.045506">10.1103/PhysRevC.91.045506 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of Parity-Violating Asymmetry in Electron-Deuteron Inelastic Scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Wang%2C+D">D. Wang</a>, <a href="/search/nucl-ex?searchtype=author&query=Pan%2C+K">K. Pan</a>, <a href="/search/nucl-ex?searchtype=author&query=Subedi%2C+R">R. Subedi</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahmed%2C+Z">Z. Ahmed</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K+A">K. A. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Arrington%2C+J">J. Arrington</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellini%2C+V">V. Bellini</a>, <a href="/search/nucl-ex?searchtype=author&query=Beminiwattha%2C+R">R. Beminiwattha</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=Deng%2C+X">X. Deng</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a> , et al. (76 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1411.3200v1-abstract-short" style="display: inline;"> The parity-violating asymmetries between a longitudinally-polarized electron beam and an unpolarized deuterium target have been measured recently. The measurement covered two kinematic points in the deep inelastic scattering region and five in the nucleon resonance region. We provide here details of the experimental setup, data analysis, and results on all asymmetry measurements including parity-v… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1411.3200v1-abstract-full').style.display = 'inline'; document.getElementById('1411.3200v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1411.3200v1-abstract-full" style="display: none;"> The parity-violating asymmetries between a longitudinally-polarized electron beam and an unpolarized deuterium target have been measured recently. The measurement covered two kinematic points in the deep inelastic scattering region and five in the nucleon resonance region. We provide here details of the experimental setup, data analysis, and results on all asymmetry measurements including parity-violating electron asymmetries and those of inclusive pion production and beam-normal asymmetries. The parity-violating deep-inelastic asymmetries were used to extract the electron-quark weak effective couplings, and the resonance asymmetries provided the first evidence for quark-hadron duality in electroweak observables. These electron asymmetries and their interpretation were published earlier, but are presented here in more detail. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1411.3200v1-abstract-full').style.display = 'none'; document.getElementById('1411.3200v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 November, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">50 pages, submitted to Phys. Rev. C</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1409.7100">arXiv:1409.7100</a> <span> [<a href="https://arxiv.org/pdf/1409.7100">pdf</a>, <a href="https://arxiv.org/format/1409.7100">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Accelerator Physics">physics.acc-ph</span> </div> </div> <p class="title is-5 mathjax"> The Q_weak Experimental Apparatus </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Qweak+Collaboration"> Qweak Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Allison%2C+T">T. Allison</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+M">M. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Androic%2C+D">D. Androic</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Asaturyan%2C+A">A. Asaturyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T+D">T. D. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Averill%2C+R">R. Averill</a>, <a href="/search/nucl-ex?searchtype=author&query=Balewski%2C+J">J. Balewski</a>, <a href="/search/nucl-ex?searchtype=author&query=Beaufait%2C+J">J. Beaufait</a>, <a href="/search/nucl-ex?searchtype=author&query=Beminiwattha%2C+R+S">R. S. Beminiwattha</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bessuille%2C+J">J. Bessuille</a>, <a href="/search/nucl-ex?searchtype=author&query=Birchall%2C+J">J. Birchall</a>, <a href="/search/nucl-ex?searchtype=author&query=Bonnell%2C+E">E. Bonnell</a>, <a href="/search/nucl-ex?searchtype=author&query=Bowman%2C+J">J. Bowman</a>, <a href="/search/nucl-ex?searchtype=author&query=Brindza%2C+P">P. Brindza</a>, <a href="/search/nucl-ex?searchtype=author&query=Brown%2C+D+B">D. B. Brown</a>, <a href="/search/nucl-ex?searchtype=author&query=Carlini%2C+R+D">R. D. Carlini</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Cavness%2C+B">B. Cavness</a>, <a href="/search/nucl-ex?searchtype=author&query=Clark%2C+G">G. Clark</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Dusa%2C+S+C">S. Covrig Dusa</a> , et al. (104 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1409.7100v2-abstract-short" style="display: inline;"> The Jefferson Lab Q_weak experiment determined the weak charge of the proton by measuring the parity-violating elastic scattering asymmetry of longitudinally polarized electrons from an unpolarized liquid hydrogen target at small momentum transfer. A custom apparatus was designed for this experiment to meet the technical challenges presented by the smallest and most precise ${\vec{e}}$p asymmetry… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1409.7100v2-abstract-full').style.display = 'inline'; document.getElementById('1409.7100v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1409.7100v2-abstract-full" style="display: none;"> The Jefferson Lab Q_weak experiment determined the weak charge of the proton by measuring the parity-violating elastic scattering asymmetry of longitudinally polarized electrons from an unpolarized liquid hydrogen target at small momentum transfer. A custom apparatus was designed for this experiment to meet the technical challenges presented by the smallest and most precise ${\vec{e}}$p asymmetry ever measured. Technical milestones were achieved at Jefferson Lab in target power, beam current, beam helicity reversal rate, polarimetry, detected rates, and control of helicity-correlated beam properties. The experiment employed 180 microA of 89% longitudinally polarized electrons whose helicity was reversed 960 times per second. The electrons were accelerated to 1.16 GeV and directed to a beamline with extensive instrumentation to measure helicity-correlated beam properties that can induce false asymmetries. Moller and Compton polarimetry were used to measure the electron beam polarization to better than 1%. The electron beam was incident on a 34.4 cm liquid hydrogen target. After passing through a triple collimator system, scattered electrons between 5.8 degrees and 11.6 degrees were bent in the toroidal magnetic field of a resistive copper-coil magnet. The electrons inside this acceptance were focused onto eight fused silica Cerenkov detectors arrayed symmetrically around the beam axis. A total scattered electron rate of about 7 GHz was incident on the detector array. The detectors were read out in integrating mode by custom-built low-noise pre-amplifiers and 18-bit sampling ADC modules. The momentum transfer Q^2 = 0.025 GeV^2 was determined using dedicated low-current (~100 pA) measurements with a set of drift chambers before (and a set of drift chambers and trigger scintillation counters after) the toroidal magnet. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1409.7100v2-abstract-full').style.display = 'none'; document.getElementById('1409.7100v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 January, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 September, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">48 pages, 36 figures. Accepted by Nuclear Instruments and Methods A</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLab-PHY-14-1959 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1409.2253">arXiv:1409.2253</a> <span> [<a href="https://arxiv.org/pdf/1409.2253">pdf</a>, <a href="https://arxiv.org/format/1409.2253">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.113.232505">10.1103/PhysRevLett.113.232505 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of double-polarization asymmetries in the quasi-elastic $^3\vec{\mathrm{He}}(\vec{\mathrm{e}},\mathrm{e}'\mathrm{d})$ process </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=The+Jefferson+Lab+Hall+A+Collaboration"> The Jefferson Lab Hall A Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Mihovilovi%C4%8D%2C+M">M. Mihovilovi膷</a>, <a href="/search/nucl-ex?searchtype=author&query=Jin%2C+G">G. Jin</a>, <a href="/search/nucl-ex?searchtype=author&query=Long%2C+E">E. Long</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhang%2C+Y+-">Y. -W. Zhang</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+B">B. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J+R+M">J. R. M. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradshaw%2C+P">P. Bradshaw</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+P">J. P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a>, <a href="/search/nucl-ex?searchtype=author&query=Deng%2C+X">X. Deng</a>, <a href="/search/nucl-ex?searchtype=author&query=Deltuva%2C+A">A. Deltuva</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+C">C. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Fassi%2C+L+E">L. El Fassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Flay%2C+D">D. Flay</a>, <a href="/search/nucl-ex?searchtype=author&query=Frullani%2C+S">S. Frullani</a> , et al. (74 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1409.2253v2-abstract-short" style="display: inline;"> We present a precise measurement of double-polarization asymmetries in the $^3\vec{\mathrm{He}}(\vec{\mathrm{e}},\mathrm{e}'\mathrm{d})$ reaction. This particular process is a uniquely sensitive probe of hadron dynamics in $^3\mathrm{He}$ and the structure of the underlying electromagnetic currents. The measurements have been performed in and around quasi-elastic kinematics at… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1409.2253v2-abstract-full').style.display = 'inline'; document.getElementById('1409.2253v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1409.2253v2-abstract-full" style="display: none;"> We present a precise measurement of double-polarization asymmetries in the $^3\vec{\mathrm{He}}(\vec{\mathrm{e}},\mathrm{e}'\mathrm{d})$ reaction. This particular process is a uniquely sensitive probe of hadron dynamics in $^3\mathrm{He}$ and the structure of the underlying electromagnetic currents. The measurements have been performed in and around quasi-elastic kinematics at $Q^2 = 0.25\,(\mathrm{GeV}/c)^2$ for missing momenta up to $270\,\mathrm{MeV}/c$. The asymmetries are in fair agreement with the state-of-the-art calculations in terms of their functional dependencies on $p_\mathrm{m}$ and $蠅$, but are systematically offset. Beyond the region of the quasi-elastic peak, the discrepancies become even more pronounced. Thus, our measurements have been able to reveal deficiencies in the most sophisticated calculations of the three-body nuclear system, and indicate that further refinement in the treatment of their two- and/or three-body dynamics is required. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1409.2253v2-abstract-full').style.display = 'none'; document.getElementById('1409.2253v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 October, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 September, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures, accepted for publication at Phys. Rev. Lett</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 113, 232505 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1406.1207">arXiv:1406.1207</a> <span> [<a href="https://arxiv.org/pdf/1406.1207">pdf</a>, <a href="https://arxiv.org/ps/1406.1207">ps</a>, <a href="https://arxiv.org/format/1406.1207">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2015.03.067">10.1016/j.physletb.2015.03.067 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Precision Measurements of $A_1^n$ in the Deep Inelastic Regime </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Parno%2C+D+S">D. S. Parno</a>, <a href="/search/nucl-ex?searchtype=author&query=Flay%2C+D">D. Flay</a>, <a href="/search/nucl-ex?searchtype=author&query=Posik%2C+M">M. Posik</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W">W. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=Deng%2C+X">X. Deng</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+C">C. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Fassi%2C+L+E">L. El Fassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Franklin%2C+G+B">G. B. Franklin</a>, <a href="/search/nucl-ex?searchtype=author&query=Friend%2C+M">M. Friend</a> , et al. (67 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1406.1207v3-abstract-short" style="display: inline;"> We have performed precision measurements of the double-spin virtual-photon asymmetry $A_1$ on the neutron in the deep inelastic scattering regime, using an open-geometry, large-acceptance spectrometer. Our data cover a wide kinematic range $0.277 \leq x \leq 0.548$ at an average $Q^2$ value of 3.078~(GeV/c)$^2$, doubling the available high-precision neutron data in this $x$ range. We have combined… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1406.1207v3-abstract-full').style.display = 'inline'; document.getElementById('1406.1207v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1406.1207v3-abstract-full" style="display: none;"> We have performed precision measurements of the double-spin virtual-photon asymmetry $A_1$ on the neutron in the deep inelastic scattering regime, using an open-geometry, large-acceptance spectrometer. Our data cover a wide kinematic range $0.277 \leq x \leq 0.548$ at an average $Q^2$ value of 3.078~(GeV/c)$^2$, doubling the available high-precision neutron data in this $x$ range. We have combined our results with world data on proton targets to extract the ratio of polarized-to-unpolarized parton distribution functions for up quarks and for down quarks in the same kinematic range. Our data are consistent with a previous observation of an $A_1^n$ zero crossing near $x=0.5$. We find no evidence of a transition to a positive slope in $(螖d + 螖\bar{d})/(d + \bar{d})$ up to $x=0.548$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1406.1207v3-abstract-full').style.display = 'none'; document.getElementById('1406.1207v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 June, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 2 figures, 3 tables. Two typos corrected in Table 3</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1404.7204">arXiv:1404.7204</a> <span> [<a href="https://arxiv.org/pdf/1404.7204">pdf</a>, <a href="https://arxiv.org/ps/1404.7204">ps</a>, <a href="https://arxiv.org/format/1404.7204">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.90.055201">10.1103/PhysRevC.90.055201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Single Spin Asymmetries in Charged Kaon Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized $^3{\rm{He}}$ Target </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Zhao%2C+Y+X">Y. X. Zhao</a>, <a href="/search/nucl-ex?searchtype=author&query=Wang%2C+Y">Y. Wang</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J+R+M">J. R. M. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradshaw%2C+P+C">P. C. Bradshaw</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+W">W. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chirapatpimol%2C+K">K. Chirapatpimol</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a> , et al. (91 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1404.7204v1-abstract-short" style="display: inline;"> We report the first measurement of target single spin asymmetries of charged kaons produced in semi-inclusive deep inelastic scattering of electrons off a transversely polarized $^3{\rm{He}}$ target. Both the Collins and Sivers moments, which are related to the nucleon transversity and Sivers distributions, respectively, are extracted over the kinematic range of 0.1$<$$x_{bj}$$<$0.4 for $K^{+}$ an… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.7204v1-abstract-full').style.display = 'inline'; document.getElementById('1404.7204v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1404.7204v1-abstract-full" style="display: none;"> We report the first measurement of target single spin asymmetries of charged kaons produced in semi-inclusive deep inelastic scattering of electrons off a transversely polarized $^3{\rm{He}}$ target. Both the Collins and Sivers moments, which are related to the nucleon transversity and Sivers distributions, respectively, are extracted over the kinematic range of 0.1$<$$x_{bj}$$<$0.4 for $K^{+}$ and $K^{-}$ production. While the Collins and Sivers moments for $K^{+}$ are consistent with zero within the experimental uncertainties, both moments for $K^{-}$ favor negative values. The Sivers moments are compared to the theoretical prediction from a phenomenological fit to the world data. While the $K^{+}$ Sivers moments are consistent with the prediction, the $K^{-}$ results differ from the prediction at the 2-sigma level. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.7204v1-abstract-full').style.display = 'none'; document.getElementById('1404.7204v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C.90.055201, 2014 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1404.4003">arXiv:1404.4003</a> <span> [<a href="https://arxiv.org/pdf/1404.4003">pdf</a>, <a href="https://arxiv.org/ps/1404.4003">ps</a>, <a href="https://arxiv.org/format/1404.4003">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.113.022002">10.1103/PhysRevLett.113.022002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Precision Measurement of the Neutron Twist-3 Matrix Element $d_2^n$: Probing Color Forces </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Posik%2C+M">M. Posik</a>, <a href="/search/nucl-ex?searchtype=author&query=Flay%2C+D">D. Flay</a>, <a href="/search/nucl-ex?searchtype=author&query=Parno%2C+D+S">D. S. Parno</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W">W. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Choi%2C+S">S. Choi</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=Deng%2C+X">X. Deng</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+C">C. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Fassi%2C+L+E">L. El Fassi</a>, <a href="/search/nucl-ex?searchtype=author&query=Franklin%2C+G+B">G. B. Franklin</a>, <a href="/search/nucl-ex?searchtype=author&query=Friend%2C+M">M. Friend</a> , et al. (67 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1404.4003v4-abstract-short" style="display: inline;"> Double-spin asymmetries and absolute cross sections were measured at large Bjorken $x$ (0.25 $ \le x \le $ 0.90), in both the deep-inelastic and resonance regions, by scattering longitudinally polarized electrons at beam energies of 4.7 and 5.9 GeV from a transversely and longitudinally polarized $^3$He target. In this dedicated experiment, the spin structure function $g_2$ on $^3$He was determine… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.4003v4-abstract-full').style.display = 'inline'; document.getElementById('1404.4003v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1404.4003v4-abstract-full" style="display: none;"> Double-spin asymmetries and absolute cross sections were measured at large Bjorken $x$ (0.25 $ \le x \le $ 0.90), in both the deep-inelastic and resonance regions, by scattering longitudinally polarized electrons at beam energies of 4.7 and 5.9 GeV from a transversely and longitudinally polarized $^3$He target. In this dedicated experiment, the spin structure function $g_2$ on $^3$He was determined with precision at large $x$, and the neutron twist-three matrix element $d_2^n$ was measured at $\left< Q^2\right>$ of 3.21 and 4.32 GeV$^2$/$c^2$, with an absolute precision of about $10^{-5}$. Our results are found to be in agreement with lattice QCD calculations and resolve the disagreement found with previous data at $\left< Q^2\right> =$ 5 GeV$^2$/$c^2$. Combining $d_2^n$ and a newly extracted twist-four matrix element, $f_2^n$, the average neutron color electric and magnetic forces were extracted and found to be of opposite sign and about 30 MeV/fm in magnitude. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.4003v4-abstract-full').style.display = 'none'; document.getElementById('1404.4003v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 July, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Corrected a typo in the author list and Figure 1 legend. 6 pages, 2 figures, 2 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1312.3047">arXiv:1312.3047</a> <span> [<a href="https://arxiv.org/pdf/1312.3047">pdf</a>, <a href="https://arxiv.org/ps/1312.3047">ps</a>, <a href="https://arxiv.org/format/1312.3047">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.90.055209">10.1103/PhysRevC.90.055209 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of pretzelosity asymmetry of charged pion production in Semi-Inclusive Deep Inelastic Scattering on a polarized $^3$He target </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Zhang%2C+Y">Y. Zhang</a>, <a href="/search/nucl-ex?searchtype=author&query=Qian%2C+X">X. Qian</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+C">C. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Huang%2C+J">J. Huang</a>, <a href="/search/nucl-ex?searchtype=author&query=Katich%2C+J">J. Katich</a>, <a href="/search/nucl-ex?searchtype=author&query=Wang%2C+Y">Y. Wang</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J+R+M">J. R. M. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradshaw%2C+P+C">P. C. Bradshaw</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+W">W. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chirapatpimol%2C+K">K. Chirapatpimol</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a> , et al. (90 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1312.3047v3-abstract-short" style="display: inline;"> An experiment to measure single-spin asymmetries in semi-inclusive production of charged pions in deep-inelastic scattering on a transversely polarized $^3$He target was performed at Jefferson Lab in the kinematic region of $0.16<x<0.35$ and $1.4<Q^2<2.7$ ${\rm GeV^2}$. The pretzelosity asymmetries on $^3$He, which can be expressed as the convolution of the $h^\perp_{1T}$ transverse momentum depen… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.3047v3-abstract-full').style.display = 'inline'; document.getElementById('1312.3047v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1312.3047v3-abstract-full" style="display: none;"> An experiment to measure single-spin asymmetries in semi-inclusive production of charged pions in deep-inelastic scattering on a transversely polarized $^3$He target was performed at Jefferson Lab in the kinematic region of $0.16<x<0.35$ and $1.4<Q^2<2.7$ ${\rm GeV^2}$. The pretzelosity asymmetries on $^3$He, which can be expressed as the convolution of the $h^\perp_{1T}$ transverse momentum dependent distribution functions and the Collins fragmentation functions in the leading order, were measured for the first time. Using the effective polarization approximation, we extracted the corresponding neutron asymmetries from the measured $^3$He asymmetries and cross-section ratios between the proton and $^3$He. Our results show that for both $蟺^{\pm}$ on $^3$He and on the neutron the pretzelosity asymmetries are consistent with zero within experimental uncertainties. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1312.3047v3-abstract-full').style.display = 'none'; document.getElementById('1312.3047v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 December, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 December, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 3 figures; enlarged the legends in Fig.3; added 3 citations</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 90, 055209 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1311.6437">arXiv:1311.6437</a> <span> [<a href="https://arxiv.org/pdf/1311.6437">pdf</a>, <a href="https://arxiv.org/format/1311.6437">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1051/epjconf/20146605002">10.1051/epjconf/20146605002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Early Results from the Qweak Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Androic%2C+D">D. Androic</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Asaturyan%2C+A">A. Asaturyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Balewski%2C+J">J. Balewski</a>, <a href="/search/nucl-ex?searchtype=author&query=Beaufait%2C+J">J. Beaufait</a>, <a href="/search/nucl-ex?searchtype=author&query=Beminiwattha%2C+R+S">R. S. Beminiwattha</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Birchall%2C+J">J. Birchall</a>, <a href="/search/nucl-ex?searchtype=author&query=Carlini%2C+R+D">R. D. Carlini</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Covrig%2C+S">S. Covrig</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Davis%2C+C+A">C. A. Davis</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=Diefenbach%2C+J">J. Diefenbach</a>, <a href="/search/nucl-ex?searchtype=author&query=Dowd%2C+J+F">J. F. Dowd</a>, <a href="/search/nucl-ex?searchtype=author&query=Dunne%2C+J+A">J. A. Dunne</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+D">D. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Duvall%2C+W+S">W. S. Duvall</a>, <a href="/search/nucl-ex?searchtype=author&query=Elaasar%2C+M">M. Elaasar</a>, <a href="/search/nucl-ex?searchtype=author&query=Falk%2C+W+R">W. R. Falk</a>, <a href="/search/nucl-ex?searchtype=author&query=Finn%2C+J+M">J. M. Finn</a> , et al. (72 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1311.6437v1-abstract-short" style="display: inline;"> A subset of results from the recently completed Jefferson Lab Qweak experiment are reported. This experiment, sensitive to physics beyond the Standard Model, exploits the small parity-violating asymmetry in elastic ep scattering to provide the first determination of the protons weak charge Qweak(p). The experiment employed a 180 uA longitudinally polarized 1.16 GeV electron beam on a 35 cm long li… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.6437v1-abstract-full').style.display = 'inline'; document.getElementById('1311.6437v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1311.6437v1-abstract-full" style="display: none;"> A subset of results from the recently completed Jefferson Lab Qweak experiment are reported. This experiment, sensitive to physics beyond the Standard Model, exploits the small parity-violating asymmetry in elastic ep scattering to provide the first determination of the protons weak charge Qweak(p). The experiment employed a 180 uA longitudinally polarized 1.16 GeV electron beam on a 35 cm long liquid hydrogen target. Scattered electrons corresponding to Q2 of 0.025 GeV2 were detected in eight Cerenkov detectors arrayed symmetrically around the beam axis. The goals of the experiment were to provide a measure of Qweak(p) to 4.2 percent (combined statistical and systematic error), which implies a measure of sin2(thetaw) at the level of 0.3 percent, and to help constrain the vector weak quark charges C1u and C1d. The experimental method is described, with particular focus on the challenges associated with the worlds highest power LH2 target. The new constraints on C1u and C1d provided by the subset of the experiments data analyzed to date will also be shown, together with the extracted weak charge of the neutron. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.6437v1-abstract-full').style.display = 'none'; document.getElementById('1311.6437v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 4 figures, INPC2013</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1311.1866">arXiv:1311.1866</a> <span> [<a href="https://arxiv.org/pdf/1311.1866">pdf</a>, <a href="https://arxiv.org/ps/1311.1866">ps</a>, <a href="https://arxiv.org/format/1311.1866">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.89.042201">10.1103/PhysRevC.89.042201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Single Spin Asymmetries of Inclusive Hadrons Produced in Electron Scattering from a Transversely Polarized $^3$He Target </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhao%2C+Y+X">Y. X. Zhao</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J+R+M">J. R. M. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradshaw%2C+P+C">P. C. Bradshaw</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+W">W. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chirapatpimol%2C+K">K. Chirapatpimol</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M">M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a>, <a href="/search/nucl-ex?searchtype=author&query=Deng%2C+X">X. Deng</a> , et al. (91 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1311.1866v2-abstract-short" style="display: inline;"> We report the first measurement of target single-spin asymmetries (A$_N$) in the inclusive hadron production reaction, $e~$+$~^3\text{He}^{\uparrow}\rightarrow h+X$, using a transversely polarized $^3$He target. The experiment was conducted at Jefferson Lab in Hall A using a 5.9-GeV electron beam. Three types of hadrons ($蟺^{\pm}$, $\text{K}^{\pm}$ and proton) were detected in the transverse hadro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.1866v2-abstract-full').style.display = 'inline'; document.getElementById('1311.1866v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1311.1866v2-abstract-full" style="display: none;"> We report the first measurement of target single-spin asymmetries (A$_N$) in the inclusive hadron production reaction, $e~$+$~^3\text{He}^{\uparrow}\rightarrow h+X$, using a transversely polarized $^3$He target. The experiment was conducted at Jefferson Lab in Hall A using a 5.9-GeV electron beam. Three types of hadrons ($蟺^{\pm}$, $\text{K}^{\pm}$ and proton) were detected in the transverse hadron momentum range 0.54 $<p_T<$ 0.74 GeV/c. The range of $x_F$ for pions was -0.29 $<x_F<$ -0.23 and for kaons -0.25 $<x_F<$-0.18. The observed asymmetry strongly depends on the type of hadron. A positive asymmetry is observed for $蟺^+$ and $\text{K}^+$. A negative asymmetry is observed for $蟺^{-}$. The magnitudes of the asymmetries follow $|A^{蟺^-}| < |A^{蟺^+}| < |A^{K^+}|$. The K$^{-}$ and proton asymmetries are consistent with zero within the experimental uncertainties. The $蟺^{+}$ and $蟺^{-}$ asymmetries measured for the $^3$He target and extracted for neutrons are opposite in sign with a small increase observed as a function of $p_T$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.1866v2-abstract-full').style.display = 'none'; document.getElementById('1311.1866v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 March, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Updated version, submitted to Phys. Rev. C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 89, 042201(R), 2014 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1311.0197">arXiv:1311.0197</a> <span> [<a href="https://arxiv.org/pdf/1311.0197">pdf</a>, <a href="https://arxiv.org/format/1311.0197">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.113.022502">10.1103/PhysRevLett.113.022502 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the Target-Normal Single-Spin Asymmetry in Deep-Inelastic Scattering from the Reaction $^{3}\mathrm{He}^{\uparrow}(e,e')X$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Katich%2C+J">J. Katich</a>, <a href="/search/nucl-ex?searchtype=author&query=Qian%2C+X">X. Qian</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhao%2C+Y+X">Y. X. Zhao</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J+R+M">J. R. M. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradshaw%2C+P+C">P. C. Bradshaw</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+W">W. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chirapatpimol%2C+K">K. Chirapatpimol</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a> , et al. (91 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1311.0197v4-abstract-short" style="display: inline;"> We report the first measurement of the target-normal single-spin asymmetry in deep-inelastic scattering from the inclusive reaction $^3$He$^{\uparrow}\left(e,e' \right)X$ on a polarized $^3$He gas target. Assuming time-reversal invariance, this asymmetry is strictly zero in the Born approximation but can be non-zero if two-photon-exchange contributions are included. The experiment, conducted at Je… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.0197v4-abstract-full').style.display = 'inline'; document.getElementById('1311.0197v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1311.0197v4-abstract-full" style="display: none;"> We report the first measurement of the target-normal single-spin asymmetry in deep-inelastic scattering from the inclusive reaction $^3$He$^{\uparrow}\left(e,e' \right)X$ on a polarized $^3$He gas target. Assuming time-reversal invariance, this asymmetry is strictly zero in the Born approximation but can be non-zero if two-photon-exchange contributions are included. The experiment, conducted at Jefferson Lab using a 5.89 GeV electron beam, covers a range of $1.7 < W < 2.9$ GeV, $1.0<Q^2<4.0$ GeV$^2$ and $0.16<x<0.65$. Neutron asymmetries were extracted using the effective nucleon polarization and measured proton-to-$^3$He cross section ratios. The measured neutron asymmetries are negative with an average value of $(-1.09 \pm 0.38) \times10^{-2}$ for invariant mass $W>2$ GeV, which is non-zero at the $2.89蟽$ level. Our measured asymmetry agrees both in sign and magnitude with a two-photon-exchange model prediction that uses input from the Sivers transverse momentum distribution obtained from semi-inclusive deep-inelastic scattering. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.0197v4-abstract-full').style.display = 'none'; document.getElementById('1311.0197v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 August, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">This is the final edited version as published in PRL</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 113, 022502 (2014) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1309.4004">arXiv:1309.4004</a> <span> [<a href="https://arxiv.org/pdf/1309.4004">pdf</a>, <a href="https://arxiv.org/format/1309.4004">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.91.055205">10.1103/PhysRevC.91.055205 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Development of High-Performance Alkali-Hybrid Polarized $^3\mathrm{He}$ Targets for Electron Scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Singh%2C+J+T">Jaideep T. Singh</a>, <a href="/search/nucl-ex?searchtype=author&query=Dolph%2C+P+A+M">P. A. M. Dolph</a>, <a href="/search/nucl-ex?searchtype=author&query=Tobias%2C+W+A">W. A. Tobias</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T+D">T. D. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Kelleher%2C+A">A. Kelleher</a>, <a href="/search/nucl-ex?searchtype=author&query=Mooney%2C+K+E">K. E. Mooney</a>, <a href="/search/nucl-ex?searchtype=author&query=Nelyubin%2C+V+V">V. V. Nelyubin</a>, <a href="/search/nucl-ex?searchtype=author&query=Wang%2C+Y">Yunxiao Wang</a>, <a href="/search/nucl-ex?searchtype=author&query=Zheng%2C+Y">Yuan Zheng</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1309.4004v2-abstract-short" style="display: inline;"> We present the development of high-performance polarized $^3\mathrm{He}$ targets for use in electron scattering experiments that utilize the technique of alkali-hybrid spin-exchange optical pumping. We include data obtained during the characterization of 24 separate target cells, each of which was constructed while preparing for one of four experiments at Jefferson Laboratory in Newport News, Virg… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.4004v2-abstract-full').style.display = 'inline'; document.getElementById('1309.4004v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1309.4004v2-abstract-full" style="display: none;"> We present the development of high-performance polarized $^3\mathrm{He}$ targets for use in electron scattering experiments that utilize the technique of alkali-hybrid spin-exchange optical pumping. We include data obtained during the characterization of 24 separate target cells, each of which was constructed while preparing for one of four experiments at Jefferson Laboratory in Newport News, Virginia. The results presented here document dramatic improvement in the performance of polarized $^3\mathrm{He}$ targets, as well as the target properties and operating parameters that made those improvements possible. Included in our measurements were determinations of the so-called $X$-factors that quantify a temperature-dependent and as-yet poorly understood spin-relaxation mechanism that limits the maximum achievable $^3\mathrm{He}$ polarization to well under 100%. The presence of this spin-relaxation mechanism was clearly evident in our data. We also present results from a simulation of the alkali-hydrid spin-exchange optical pumping process that was developed to provide guidance in the design of these targets. Good agreement with actual performance was obtained by including details such as off-resonant optical pumping. Now benchmarked against experimental data, the simulation is useful for the design of future targets. Included in our results is a measurement of the $\mathrm{K}$-$^3\mathrm{He}$ spin-exchange rate coefficient $k^\mathrm{K}_\mathrm{se} = \left ( 7.46 \pm 0.62 \right )\!\times\!10^{-20}\ \mathrm{cm^3/s}$ over the temperature range 503 K to 563 K. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1309.4004v2-abstract-full').style.display = 'none'; document.getElementById('1309.4004v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 April, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 September, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">26 pages, 18 figures, includes several revisions based on referee reports, accepted by Phys. Rev. C on 2015-04-20, in press</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 91, 055205 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1307.5275">arXiv:1307.5275</a> <span> [<a href="https://arxiv.org/pdf/1307.5275">pdf</a>, <a href="https://arxiv.org/ps/1307.5275">ps</a>, <a href="https://arxiv.org/format/1307.5275">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.111.141803">10.1103/PhysRevLett.111.141803 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First Determination of the Weak Charge of the Proton </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Qweak+Collaboration"> Qweak Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Androic%2C+D">D. Androic</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Asaturyan%2C+A">A. Asaturyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Balewski%2C+J">J. Balewski</a>, <a href="/search/nucl-ex?searchtype=author&query=Beaufait%2C+J">J. Beaufait</a>, <a href="/search/nucl-ex?searchtype=author&query=Beminiwattha%2C+R+S">R. S. Beminiwattha</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Birchall%2C+J">J. Birchall</a>, <a href="/search/nucl-ex?searchtype=author&query=Carlini%2C+R+D">R. D. Carlini</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Covrig%2C+S">S. Covrig</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=Davis%2C+C+A">C. A. Davis</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=Diefenbach%2C+J">J. Diefenbach</a>, <a href="/search/nucl-ex?searchtype=author&query=Dowd%2C+J+F">J. F. Dowd</a>, <a href="/search/nucl-ex?searchtype=author&query=Dunne%2C+J+A">J. A. Dunne</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+D">D. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Duvall%2C+W+S">W. S. Duvall</a>, <a href="/search/nucl-ex?searchtype=author&query=Elaasar%2C+M">M. Elaasar</a>, <a href="/search/nucl-ex?searchtype=author&query=Falk%2C+W+R">W. R. Falk</a> , et al. (73 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1307.5275v2-abstract-short" style="display: inline;"> The Qweak experiment has measured the parity-violating asymmetry in polarized e-p elastic scattering at Q^2 = 0.025(GeV/c)^2, employing 145 microamps of 89% longitudinally polarized electrons on a 34.4cm long liquid hydrogen target at Jefferson Lab. The results of the experiment's commissioning run are reported here, constituting approximately 4% of the data collected in the experiment. From these… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.5275v2-abstract-full').style.display = 'inline'; document.getElementById('1307.5275v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1307.5275v2-abstract-full" style="display: none;"> The Qweak experiment has measured the parity-violating asymmetry in polarized e-p elastic scattering at Q^2 = 0.025(GeV/c)^2, employing 145 microamps of 89% longitudinally polarized electrons on a 34.4cm long liquid hydrogen target at Jefferson Lab. The results of the experiment's commissioning run are reported here, constituting approximately 4% of the data collected in the experiment. From these initial results the measured asymmetry is Aep = -279 +- 35 (statistics) +- 31 (systematics) ppb, which is the smallest and most precise asymmetry ever measured in polarized e-p scattering. The small Q^2 of this experiment has made possible the first determination of the weak charge of the proton, QpW, by incorporating earlier parity-violating electron scattering (PVES) data at higher Q^2 to constrain hadronic corrections. The value of QpW obtained in this way is QpW(PVES) = 0.064 +- 0.012, in good agreement with the Standard Model prediction of QpW(SM) = 0.0710 +- 0.0007. When this result is further combined with the Cs atomic parity violation (APV) measurement, significant constraints on the weak charges of the up and down quarks can also be extracted. That PVES+APV analysis reveals the neutron's weak charge to be QnW(PVES+APV) = -0.975 +- 0.010. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.5275v2-abstract-full').style.display = 'none'; document.getElementById('1307.5275v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 September, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 July, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-13-1756 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 111, 141803 (2013) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1304.7741">arXiv:1304.7741</a> <span> [<a href="https://arxiv.org/pdf/1304.7741">pdf</a>, <a href="https://arxiv.org/ps/1304.7741">ps</a>, <a href="https://arxiv.org/format/1304.7741">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.111.082501">10.1103/PhysRevLett.111.082501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the Parity-Violating Asymmetry in Electron-Deuteron Scattering in the Nucleon Resonance Region </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Wang%2C+D">D. Wang</a>, <a href="/search/nucl-ex?searchtype=author&query=Pan%2C+K">K. Pan</a>, <a href="/search/nucl-ex?searchtype=author&query=Subedi%2C+R">R. Subedi</a>, <a href="/search/nucl-ex?searchtype=author&query=Deng%2C+X">X. Deng</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahmed%2C+Z">Z. Ahmed</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K+A">K. A. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Arrington%2C+J">J. Arrington</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellini%2C+V">V. Bellini</a>, <a href="/search/nucl-ex?searchtype=author&query=Beminiwattha%2C+R">R. Beminiwattha</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+C">C. Dutta</a> , et al. (73 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1304.7741v2-abstract-short" style="display: inline;"> We report on parity-violating asymmetries in the nucleon resonance region measured using $5 - 6$ GeV longitudinally polarized electrons scattering off an unpolarized deuterium target. These results are the first parity-violating asymmetry data in the resonance region beyond the $螖(1232)$, and provide a verification of quark-hadron duality in the nucleon electroweak $纬Z$ interference structure func… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1304.7741v2-abstract-full').style.display = 'inline'; document.getElementById('1304.7741v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1304.7741v2-abstract-full" style="display: none;"> We report on parity-violating asymmetries in the nucleon resonance region measured using $5 - 6$ GeV longitudinally polarized electrons scattering off an unpolarized deuterium target. These results are the first parity-violating asymmetry data in the resonance region beyond the $螖(1232)$, and provide a verification of quark-hadron duality in the nucleon electroweak $纬Z$ interference structure functions at the (10-15)% level. The results are of particular interest to models relevant for calculating the $纬Z$ box-diagram corrections to elastic parity-violating electron scattering measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1304.7741v2-abstract-full').style.display = 'none'; document.getElementById('1304.7741v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 August, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 April, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 1 figure, to appear in Phys. Rev. Lett</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 111, 082501 (2013) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1304.4497">arXiv:1304.4497</a> <span> [<a href="https://arxiv.org/pdf/1304.4497">pdf</a>, <a href="https://arxiv.org/ps/1304.4497">ps</a>, <a href="https://arxiv.org/format/1304.4497">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.92.015208">10.1103/PhysRevC.92.015208 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Moments of the neutron $g_2$ structure function at intermediate $Q^2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Solvignon%2C+P">P. Solvignon</a>, <a href="/search/nucl-ex?searchtype=author&query=Liyanage%2C+N">N. Liyanage</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Choi%2C+S">Seonho Choi</a>, <a href="/search/nucl-ex?searchtype=author&query=Slifer%2C+K">K. Slifer</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chang%2C+C+C">C. C. Chang</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Craver%2C+B">B. Craver</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+D">D. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Ent%2C+R">R. Ent</a>, <a href="/search/nucl-ex?searchtype=author&query=Feuerbach%2C+R">R. Feuerbach</a>, <a href="/search/nucl-ex?searchtype=author&query=Frullani%2C+S">S. Frullani</a>, <a href="/search/nucl-ex?searchtype=author&query=Gao%2C+H">H. Gao</a>, <a href="/search/nucl-ex?searchtype=author&query=Garibaldi%2C+F">F. Garibaldi</a>, <a href="/search/nucl-ex?searchtype=author&query=Gilman%2C+R">R. Gilman</a>, <a href="/search/nucl-ex?searchtype=author&query=Glashausser%2C+C">C. Glashausser</a>, <a href="/search/nucl-ex?searchtype=author&query=Gorbenko%2C+V">V. Gorbenko</a>, <a href="/search/nucl-ex?searchtype=author&query=Hansen%2C+O">O. Hansen</a> , et al. (37 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1304.4497v5-abstract-short" style="display: inline;"> We present new experimental results of the $^3$He spin structure function $g_2$ in the resonance region at $Q^2$ values between 1.2 and 3.0 (GeV/c)$^2$. Spin dependent moments of the neutron were then extracted. Our main result, the resonance contribution to the neutron $d_2$ matrix element, was found to be small at $<Q^2>$=2.4 (GeV/c)$^2$ and in agreement with the Lattice QCD calculation. The Bur… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1304.4497v5-abstract-full').style.display = 'inline'; document.getElementById('1304.4497v5-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1304.4497v5-abstract-full" style="display: none;"> We present new experimental results of the $^3$He spin structure function $g_2$ in the resonance region at $Q^2$ values between 1.2 and 3.0 (GeV/c)$^2$. Spin dependent moments of the neutron were then extracted. Our main result, the resonance contribution to the neutron $d_2$ matrix element, was found to be small at $<Q^2>$=2.4 (GeV/c)$^2$ and in agreement with the Lattice QCD calculation. The Burkhardt-Cottingham sum rule for $^3$He and the neutron was tested with the measured data and using the Wandzura-Wilczek relation for the low $x$ unmeasured region. A small deviation was observed at $Q^2$ values between 0.5 and 1.2 (GeV/c)$^2$ for the neutron. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1304.4497v5-abstract-full').style.display = 'none'; document.getElementById('1304.4497v5-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 June, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 April, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 92, 015208 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1302.4324">arXiv:1302.4324</a> <span> [<a href="https://arxiv.org/pdf/1302.4324">pdf</a>, <a href="https://arxiv.org/format/1302.4324">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Hall A Annual Report 2012 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Riordan%2C+S">S. Riordan</a>, <a href="/search/nucl-ex?searchtype=author&query=Keppel%2C+C">C. Keppel</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J">J. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Arrington%2C+J">J. Arrington</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayoso%2C+C+A">C. Ayerbe Gayoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Brash%2C+E">E. Brash</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Flay%2C+D">D. Flay</a>, <a href="/search/nucl-ex?searchtype=author&query=Franklin%2C+G+B">G. B. Franklin</a>, <a href="/search/nucl-ex?searchtype=author&query=Friedman%2C+M">M. Friedman</a>, <a href="/search/nucl-ex?searchtype=author&query=Glamazdin%2C+O">O. Glamazdin</a>, <a href="/search/nucl-ex?searchtype=author&query=Gomez%2C+J">J. Gomez</a>, <a href="/search/nucl-ex?searchtype=author&query=Hanretty%2C+C">C. Hanretty</a>, <a href="/search/nucl-ex?searchtype=author&query=Hansen%2C+J+-">J. -O. Hansen</a>, <a href="/search/nucl-ex?searchtype=author&query=Hyde%2C+C">C. Hyde</a>, <a href="/search/nucl-ex?searchtype=author&query=Jones%2C+M+K">M. K. Jones</a>, <a href="/search/nucl-ex?searchtype=author&query=Korover%2C+I">I. Korover</a>, <a href="/search/nucl-ex?searchtype=author&query=LeRose%2C+J+J">J. J. LeRose</a>, <a href="/search/nucl-ex?searchtype=author&query=Lindgren%2C+R+A">R. A. Lindgren</a>, <a href="/search/nucl-ex?searchtype=author&query=Liyanage%2C+N">N. Liyanage</a>, <a href="/search/nucl-ex?searchtype=author&query=Long%2C+E">E. Long</a> , et al. (24 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1302.4324v1-abstract-short" style="display: inline;"> Report over the experimental activities in Hall A at Thomas Jefferson National Accelerator Facility. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1302.4324v1-abstract-full" style="display: none;"> Report over the experimental activities in Hall A at Thomas Jefferson National Accelerator Facility. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1302.4324v1-abstract-full').style.display = 'none'; document.getElementById('1302.4324v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 February, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2013. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1208.6164">arXiv:1208.6164</a> <span> [<a href="https://arxiv.org/pdf/1208.6164">pdf</a>, <a href="https://arxiv.org/ps/1208.6164">ps</a>, <a href="https://arxiv.org/format/1208.6164">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.109.192501">10.1103/PhysRevLett.109.192501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> New Measurements of the Transverse Beam Asymmetry for Elastic Electron Scattering from Selected Nuclei </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=HAPPEX%2C+T">The HAPPEX</a>, <a href="/search/nucl-ex?searchtype=author&query=Collaborations%2C+P">PREX Collaborations</a>, <a href="/search/nucl-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/nucl-ex?searchtype=author&query=Abrahamyan%2C+S">S. Abrahamyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Acha%2C+A">A. Acha</a>, <a href="/search/nucl-ex?searchtype=author&query=Afanasev%2C+A">A. Afanasev</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahmed%2C+Z">Z. Ahmed</a>, <a href="/search/nucl-ex?searchtype=author&query=Albataineh%2C+H">H. Albataineh</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W">W. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Arrington%2C+J">J. Arrington</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Babineau%2C+B">B. Babineau</a>, <a href="/search/nucl-ex?searchtype=author&query=Bailey%2C+S+L">S. L. Bailey</a>, <a href="/search/nucl-ex?searchtype=author&query=Barber%2C+J">J. Barber</a>, <a href="/search/nucl-ex?searchtype=author&query=Barbieri%2C+A">A. Barbieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Beck%2C+A">A. Beck</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellini%2C+V">V. Bellini</a>, <a href="/search/nucl-ex?searchtype=author&query=Beminiwattha%2C+R">R. Beminiwattha</a>, <a href="/search/nucl-ex?searchtype=author&query=Benaoum%2C+H">H. Benaoum</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertin%2C+P">P. Bertin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielarski%2C+T">T. Bielarski</a> , et al. (173 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1208.6164v3-abstract-short" style="display: inline;"> We have measured the beam-normal single-spin asymmetry $A_n$ in the elastic scattering of 1-3 GeV transversely polarized electrons from $^1$H and for the first time from $^4$He, $^{12}$C, and $^{208}$Pb. For $^1$H, $^4$He and $^{12}$C, the measurements are in agreement with calculations that relate $A_n$ to the imaginary part of the two-photon exchange amplitude including inelastic intermediate st… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1208.6164v3-abstract-full').style.display = 'inline'; document.getElementById('1208.6164v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1208.6164v3-abstract-full" style="display: none;"> We have measured the beam-normal single-spin asymmetry $A_n$ in the elastic scattering of 1-3 GeV transversely polarized electrons from $^1$H and for the first time from $^4$He, $^{12}$C, and $^{208}$Pb. For $^1$H, $^4$He and $^{12}$C, the measurements are in agreement with calculations that relate $A_n$ to the imaginary part of the two-photon exchange amplitude including inelastic intermediate states. Surprisingly, the $^{208}$Pb result is significantly smaller than the corresponding prediction using the same formalism. These results suggest that a systematic set of new $A_n$ measurements might emerge as a new and sensitive probe of the structure of heavy nuclei. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1208.6164v3-abstract-full').style.display = 'none'; document.getElementById('1208.6164v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 October, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 August, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 3 figures, accepted by PRL. v3: fixed one author name and affiliation, otherwise no change</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 109, (2012) 192501 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1202.1255">arXiv:1202.1255</a> <span> [<a href="https://arxiv.org/pdf/1202.1255">pdf</a>, <a href="https://arxiv.org/ps/1202.1255">ps</a>, <a href="https://arxiv.org/format/1202.1255">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> The Qweak Experiment: A Search for New Physics at the TeV Scale via a Measurement of the Proton's Weak Charge </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Carlini%2C+R+D">R. D. Carlini</a>, <a href="/search/nucl-ex?searchtype=author&query=Finn%2C+J+M">J. M. Finn</a>, <a href="/search/nucl-ex?searchtype=author&query=Kowalski%2C+S">S. Kowalski</a>, <a href="/search/nucl-ex?searchtype=author&query=Page%2C+S+A">S. A. Page</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Asaturyan%2C+A">A. Asaturyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Birchall%2C+J">J. Birchall</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Bruell%2C+A">A. Bruell</a>, <a href="/search/nucl-ex?searchtype=author&query=Capuano%2C+C+L">C. L. Capuano</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G">G. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Carrigee%2C+C">C. Carrigee</a>, <a href="/search/nucl-ex?searchtype=author&query=Chattopadhyay%2C+S">S. Chattopadhyay</a>, <a href="/search/nucl-ex?searchtype=author&query=Covrig%2C+S">S. Covrig</a>, <a href="/search/nucl-ex?searchtype=author&query=Davis%2C+C+A">C. A. Davis</a>, <a href="/search/nucl-ex?searchtype=author&query=Dow%2C+K">K. Dow</a>, <a href="/search/nucl-ex?searchtype=author&query=Dunne%2C+J">J. Dunne</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+D">D. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Ent%2C+R">R. Ent</a>, <a href="/search/nucl-ex?searchtype=author&query=Erler%2C+J">J. Erler</a>, <a href="/search/nucl-ex?searchtype=author&query=Falk%2C+W">W. Falk</a>, <a href="/search/nucl-ex?searchtype=author&query=Fenker%2C+H">H. Fenker</a>, <a href="/search/nucl-ex?searchtype=author&query=Forest%2C+T+A">T. A. Forest</a> , et al. (61 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1202.1255v2-abstract-short" style="display: inline;"> We propose a new precision measurement of parity-violating electron scattering on the proton at very low Q^2 and forward angles to challenge predictions of the Standard Model and search for new physics. A unique opportunity exists to carry out the first precision measurement of the proton's weak charge, $Q_W =1 - 4\sin^2胃_W$. A 2200 hour measurement of the parity violating asymmetry in elastic ep… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1202.1255v2-abstract-full').style.display = 'inline'; document.getElementById('1202.1255v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1202.1255v2-abstract-full" style="display: none;"> We propose a new precision measurement of parity-violating electron scattering on the proton at very low Q^2 and forward angles to challenge predictions of the Standard Model and search for new physics. A unique opportunity exists to carry out the first precision measurement of the proton's weak charge, $Q_W =1 - 4\sin^2胃_W$. A 2200 hour measurement of the parity violating asymmetry in elastic ep scattering at Q^2=0.03 (GeV/c)^2 employing 180 $渭$A of 85% polarized beam on a 35 cm liquid Hydrogen target will determine the proton's weak charge with approximately 4% combined statistical and systematic errors. The Standard Model makes a firm prediction of $Q_W$, based on the running of the weak mixing angle from the Z0 pole down to low energies, corresponding to a 10 sigma effect in this experiment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1202.1255v2-abstract-full').style.display = 'none'; document.getElementById('1202.1255v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 February, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 February, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Proposal to Jefferson Lab Program Advisory Committee, December 2007. 93 pages, 44 figures. Uploaded here so a permanent copy is available, and for other papers to use arXiv version as reference First four authors are the spokespersons</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1201.2568">arXiv:1201.2568</a> <span> [<a href="https://arxiv.org/pdf/1201.2568">pdf</a>, <a href="https://arxiv.org/ps/1201.2568">ps</a>, <a href="https://arxiv.org/format/1201.2568">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.108.112502">10.1103/PhysRevLett.108.112502 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the Neutron Radius of 208Pb Through Parity-Violation in Electron Scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Abrahamyan%2C+S">S. Abrahamyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahmed%2C+Z">Z. Ahmed</a>, <a href="/search/nucl-ex?searchtype=author&query=Albataineh%2C+H">H. Albataineh</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+W">W. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Babineau%2C+B">B. Babineau</a>, <a href="/search/nucl-ex?searchtype=author&query=Barbieri%2C+A">A. Barbieri</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellini%2C+V">V. Bellini</a>, <a href="/search/nucl-ex?searchtype=author&query=Beminiwattha%2C+R">R. Beminiwattha</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bielarski%2C+T">T. Bielarski</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Carter%2C+P">P. Carter</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Hen%2C+O">O. Hen</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a> , et al. (110 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1201.2568v2-abstract-short" style="display: inline;"> We report the first measurement of the parity-violating asymmetry A_PV in the elastic scattering of polarized electrons from 208Pb. A_PV is sensitive to the radius of the neutron distribution (Rn). The result A_PV = 0.656 \pm 0.060 (stat) \pm 0.014 (syst) ppm corresponds to a difference between the radii of the neutron and proton distributions Rn - Rp = 0.33 +0.16 -0.18 fm and provides the first e… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.2568v2-abstract-full').style.display = 'inline'; document.getElementById('1201.2568v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1201.2568v2-abstract-full" style="display: none;"> We report the first measurement of the parity-violating asymmetry A_PV in the elastic scattering of polarized electrons from 208Pb. A_PV is sensitive to the radius of the neutron distribution (Rn). The result A_PV = 0.656 \pm 0.060 (stat) \pm 0.014 (syst) ppm corresponds to a difference between the radii of the neutron and proton distributions Rn - Rp = 0.33 +0.16 -0.18 fm and provides the first electroweak observation of the neutron skin which is expected in a heavy, neutron-rich nucleus. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1201.2568v2-abstract-full').style.display = 'none'; document.getElementById('1201.2568v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 January, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 January, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 1 figure</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-12-1480 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 108, 112502 (2012) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1108.0489">arXiv:1108.0489</a> <span> [<a href="https://arxiv.org/pdf/1108.0489">pdf</a>, <a href="https://arxiv.org/ps/1108.0489">ps</a>, <a href="https://arxiv.org/format/1108.0489">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.108.052001">10.1103/PhysRevLett.108.052001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Beam-Target Double Spin Asymmetry A_LT in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized He-3 Target at 1.4<Q^2<2.7 GeV^2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Huang%2C+J">J. Huang</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+C">C. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Katich%2C+J">J. Katich</a>, <a href="/search/nucl-ex?searchtype=author&query=Qian%2C+X">X. Qian</a>, <a href="/search/nucl-ex?searchtype=author&query=Wang%2C+Y">Y. Wang</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhang%2C+Y">Y. Zhang</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J+R+M">J. R. M. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradshaw%2C+P+C">P. C. Bradshaw</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+W">W. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chirapatpimol%2C+K">K. Chirapatpimol</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a> , et al. (90 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1108.0489v2-abstract-short" style="display: inline;"> We report the first measurement of the double-spin asymmetry $A_{LT}$ for charged pion electroproduction in semi\nobreakdash-inclusive deep\nobreakdash-inelastic electron scattering on a transversely polarized $^{3}$He target. The kinematics focused on the valence quark region, $0.16<x<0.35$ with $1.4<Q^{2}<2.7\,\textrm{GeV}^{2}$. The corresponding neutron $A_{LT}$ asymmetries were extracted from… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1108.0489v2-abstract-full').style.display = 'inline'; document.getElementById('1108.0489v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1108.0489v2-abstract-full" style="display: none;"> We report the first measurement of the double-spin asymmetry $A_{LT}$ for charged pion electroproduction in semi\nobreakdash-inclusive deep\nobreakdash-inelastic electron scattering on a transversely polarized $^{3}$He target. The kinematics focused on the valence quark region, $0.16<x<0.35$ with $1.4<Q^{2}<2.7\,\textrm{GeV}^{2}$. The corresponding neutron $A_{LT}$ asymmetries were extracted from the measured $^{3}$He asymmetries and proton over $^{3}$He cross section ratios using the effective polarization approximation. These new data probe the transverse momentum dependent parton distribution function $g_{1T}^{q}$ and therefore provide access to quark spin-orbit correlations. Our results indicate a positive azimuthal asymmetry for $蟺^{-}$ production on $^{3}$He and the neutron, while our $蟺^{+}$ asymmetries are consistent with zero. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1108.0489v2-abstract-full').style.display = 'none'; document.getElementById('1108.0489v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 February, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 August, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 2 figures, 1 tables, published in PRL</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-PHY-11-1359 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 108, 052001 (2012) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1107.1902">arXiv:1107.1902</a> <span> [<a href="https://arxiv.org/pdf/1107.1902">pdf</a>, <a href="https://arxiv.org/format/1107.1902">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.84.065201">10.1103/PhysRevC.84.065201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Gas dynamics in high-luminosity polarized He-3 targets using diffusion and convection </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Dolph%2C+P+A+M">P. A. M. Dolph</a>, <a href="/search/nucl-ex?searchtype=author&query=Singh%2C+J">J. Singh</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Kelleher%2C+A">A. Kelleher</a>, <a href="/search/nucl-ex?searchtype=author&query=Mooney%2C+K+E">K. E. Mooney</a>, <a href="/search/nucl-ex?searchtype=author&query=Nelyubin%2C+V">V. Nelyubin</a>, <a href="/search/nucl-ex?searchtype=author&query=Tobias%2C+W+A">W. A. Tobias</a>, <a href="/search/nucl-ex?searchtype=author&query=Wojtsekhowski%2C+B">B. Wojtsekhowski</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1107.1902v2-abstract-short" style="display: inline;"> The dynamics of the movement of gas is discussed for two-chambered polarized He-3 target cells of the sort that have been used successfully for many electron scattering experiments. A detailed analysis is presented showing that diffusion is a limiting factor in target performance, particularly as these targets are run at increasingly high luminosities. Measurements are presented on a new prototype… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1107.1902v2-abstract-full').style.display = 'inline'; document.getElementById('1107.1902v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1107.1902v2-abstract-full" style="display: none;"> The dynamics of the movement of gas is discussed for two-chambered polarized He-3 target cells of the sort that have been used successfully for many electron scattering experiments. A detailed analysis is presented showing that diffusion is a limiting factor in target performance, particularly as these targets are run at increasingly high luminosities. Measurements are presented on a new prototype polarized He-3 target cell in which the movement of gas is due largely to convection instead of diffusion. NMR tagging techniques have been used to visualize the gas flow, showing velocities along a cylindrically-shaped target of between 5-80 cm/min. The new target design addresses one of the principle obstacles to running polarized He-3 targets at substantially higher luminosities while simultaneously providing new flexibility in target geometry. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1107.1902v2-abstract-full').style.display = 'none'; document.getElementById('1107.1902v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 September, 2011; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 July, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">First revision: 14 pages, 9 figures, submitted to Phys. Rev. C. We have shortened our discussion of the limitations inherent in various historical He-3 targets, and we have added a discussion exploring the optimal performance that can be expected from a suitably modified target based on diffusion-based mixing. A reference (Jones et. al.) was added. The results we present have not changed</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 84, 065201 (13 December 2011) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1107.0913">arXiv:1107.0913</a> <span> [<a href="https://arxiv.org/pdf/1107.0913">pdf</a>, <a href="https://arxiv.org/format/1107.0913">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.108.102001">10.1103/PhysRevLett.108.102001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> New Precision Limit on the Strange Vector Form Factors of the Proton </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=HAPPEX+collaboration"> HAPPEX collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahmed%2C+Z">Z. Ahmed</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K+A">K. A. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Armstrong%2C+D+S">D. S. Armstrong</a>, <a href="/search/nucl-ex?searchtype=author&query=Arrington%2C+J">J. Arrington</a>, <a href="/search/nucl-ex?searchtype=author&query=Baturin%2C+P">P. Baturin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellini%2C+V">V. Bellini</a>, <a href="/search/nucl-ex?searchtype=author&query=Benesch%2C+J">J. Benesch</a>, <a href="/search/nucl-ex?searchtype=author&query=Beminiwattha%2C+R">R. Beminiwattha</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/nucl-ex?searchtype=author&query=Dalton%2C+M+M">M. M. Dalton</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=De+Leo%2C+R">R. De Leo</a>, <a href="/search/nucl-ex?searchtype=author&query=Deconinck%2C+W">W. Deconinck</a>, <a href="/search/nucl-ex?searchtype=author&query=Decowski%2C+P">P. Decowski</a>, <a href="/search/nucl-ex?searchtype=author&query=Deng%2C+X">X. Deng</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+C">C. Dutta</a> , et al. (80 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1107.0913v1-abstract-short" style="display: inline;"> The parity-violating cross-section asymmetry in the elastic scattering of polarized electrons from unpolarized protons has been measured at a four-momentum transfer squared Q2 = 0.624 GeV and beam energy E =3.48 GeV to be A_PV = -23.80 +/- 0.78 (stat) +/- 0.36 (syst) parts per million. This result is consistent with zero contribution of strange quarks to the combination of electric and magnetic fo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1107.0913v1-abstract-full').style.display = 'inline'; document.getElementById('1107.0913v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1107.0913v1-abstract-full" style="display: none;"> The parity-violating cross-section asymmetry in the elastic scattering of polarized electrons from unpolarized protons has been measured at a four-momentum transfer squared Q2 = 0.624 GeV and beam energy E =3.48 GeV to be A_PV = -23.80 +/- 0.78 (stat) +/- 0.36 (syst) parts per million. This result is consistent with zero contribution of strange quarks to the combination of electric and magnetic form factors G_E^s + 0.517 G_M^s = 0.003 +/- 0.010 (stat) +/- 0.004 (syst) +/- 0.009 (ff), where the third error is due to the limits of precision on the electromagnetic form factors and radiative corrections. With this measurement, the world data on strange contributions to nucleon form factors are seen to be consistent with zero and not more than a few percent of the proton form factors. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1107.0913v1-abstract-full').style.display = 'none'; document.getElementById('1107.0913v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 July, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 3 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1106.0363">arXiv:1106.0363</a> <span> [<a href="https://arxiv.org/pdf/1106.0363">pdf</a>, <a href="https://arxiv.org/ps/1106.0363">ps</a>, <a href="https://arxiv.org/format/1106.0363">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.107.072003">10.1103/PhysRevLett.107.072003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized $^3$He Target </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Qian%2C+X">X. Qian</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+C">C. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Huang%2C+J">J. Huang</a>, <a href="/search/nucl-ex?searchtype=author&query=Katich%2C+J">J. Katich</a>, <a href="/search/nucl-ex?searchtype=author&query=Wang%2C+Y">Y. Wang</a>, <a href="/search/nucl-ex?searchtype=author&query=Zhang%2C+Y">Y. Zhang</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J+R+M">J. R. M. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Benmokhtar%2C+F">F. Benmokhtar</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Bradshaw%2C+P+C">P. C. Bradshaw</a>, <a href="/search/nucl-ex?searchtype=author&query=Bosted%2C+P">P. Bosted</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Canan%2C+M">M. Canan</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+C">C. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+W">W. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chirapatpimol%2C+K">K. Chirapatpimol</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/nucl-ex?searchtype=author&query=Cornejo%2C+J+C">J. C. Cornejo</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a> , et al. (90 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1106.0363v4-abstract-short" style="display: inline;"> We report the first measurement of target single spin asymmetries in the semi-inclusive $^3{He}(e,e'蟺^\pm)X$ reaction on a transversely polarized target. The experiment, conducted at Jefferson Lab using a 5.9 GeV electron beam, covers a range of 0.14 $< x <$ 0.34 with 1.3 $<Q^2<$ 2.7 GeV$^2$. The Collins and Sivers moments were extracted from the azimuthal angular dependence of the measured asymme… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1106.0363v4-abstract-full').style.display = 'inline'; document.getElementById('1106.0363v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1106.0363v4-abstract-full" style="display: none;"> We report the first measurement of target single spin asymmetries in the semi-inclusive $^3{He}(e,e'蟺^\pm)X$ reaction on a transversely polarized target. The experiment, conducted at Jefferson Lab using a 5.9 GeV electron beam, covers a range of 0.14 $< x <$ 0.34 with 1.3 $<Q^2<$ 2.7 GeV$^2$. The Collins and Sivers moments were extracted from the azimuthal angular dependence of the measured asymmetries. The extracted $蟺^\pm$ Collins moments for $^3$He are consistent with zero, except for the $蟺^+$ moment at $x=0.34$, which deviates from zero by 2.3$蟽$. While the $蟺^-$ Sivers moments are consistent with zero, the $蟺^+$ Sivers moments favor negative values. The neutron results were extracted using the nucleon effective polarization and the measured cross section ratio of proton to $^3$He, and are largely consistent with the predictions of phenomenological fits and quark model calculations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1106.0363v4-abstract-full').style.display = 'none'; document.getElementById('1106.0363v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 August, 2011; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 June, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 2 figures, 2 tables, published in PRL</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett.107:072003,2011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1103.1808">arXiv:1103.1808</a> <span> [<a href="https://arxiv.org/pdf/1103.1808">pdf</a>, <a href="https://arxiv.org/format/1103.1808">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Theory">nucl-th</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.106.252003">10.1103/PhysRevLett.106.252003 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Flavor decomposition of the elastic nucleon electromagnetic form factors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=Riordan%2C+S">S. Riordan</a>, <a href="/search/nucl-ex?searchtype=author&query=Wojtsekhowski%2C+B">B. Wojtsekhowski</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1103.1808v1-abstract-short" style="display: inline;"> The u- and d-quark contributions to the elastic nucleon electromagnetic form factors have been determined using experimental data on GEn, GMn, GpE, and GpM. Such a flavor separation of the form factors became possible up to 3.4 GeV2 with recent data on GEn from Hall A at JLab. At a negative four-momentum transfer squared Q2 above 1 GeV2, for both the u- and d-quark components, the ratio of the Pau… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1103.1808v1-abstract-full').style.display = 'inline'; document.getElementById('1103.1808v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1103.1808v1-abstract-full" style="display: none;"> The u- and d-quark contributions to the elastic nucleon electromagnetic form factors have been determined using experimental data on GEn, GMn, GpE, and GpM. Such a flavor separation of the form factors became possible up to 3.4 GeV2 with recent data on GEn from Hall A at JLab. At a negative four-momentum transfer squared Q2 above 1 GeV2, for both the u- and d-quark components, the ratio of the Pauli form factor to the Dirac form factor, F2/F1, was found to be almost constant, and for each of F2 and F1 individually, the d-quark portions of both form factors drop continuously with increasing Q2. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1103.1808v1-abstract-full').style.display = 'none'; document.getElementById('1103.1808v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 March, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett.106:252003,2011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1009.3803">arXiv:1009.3803</a> <span> [<a href="https://arxiv.org/pdf/1009.3803">pdf</a>, <a href="https://arxiv.org/ps/1009.3803">ps</a>, <a href="https://arxiv.org/format/1009.3803">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjp/i2011-11002-4">10.1140/epjp/i2011-11002-4 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse Spin Structure of the Nucleon through Target Single Spin Asymmetry in Semi-Inclusive Deep-Inelastic $(e,e^\prime 蟺^\pm)$ Reaction at Jefferson Lab </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Gao%2C+H">H. Gao</a>, <a href="/search/nucl-ex?searchtype=author&query=Gamberg%2C+L">L. Gamberg</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Qian%2C+X">X. Qian</a>, <a href="/search/nucl-ex?searchtype=author&query=Qiang%2C+Y">Y. Qiang</a>, <a href="/search/nucl-ex?searchtype=author&query=Huang%2C+M">M. Huang</a>, <a href="/search/nucl-ex?searchtype=author&query=Afanasev%2C+A">A. Afanasev</a>, <a href="/search/nucl-ex?searchtype=author&query=Anselmino%2C+M">M. Anselmino</a>, <a href="/search/nucl-ex?searchtype=author&query=Avakian%2C+H">H. Avakian</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G">G. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C">C. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=Garibaldi%2C+F">F. Garibaldi</a>, <a href="/search/nucl-ex?searchtype=author&query=Hu%2C+B+T">B. T. Hu</a>, <a href="/search/nucl-ex?searchtype=author&query=Jiang%2C+X">X. Jiang</a>, <a href="/search/nucl-ex?searchtype=author&query=Kumar%2C+K+S">K. S. Kumar</a>, <a href="/search/nucl-ex?searchtype=author&query=Li%2C+X+M">X. M. Li</a>, <a href="/search/nucl-ex?searchtype=author&query=Lu%2C+H+J">H. J. Lu</a>, <a href="/search/nucl-ex?searchtype=author&query=Meziani%2C+Z+-">Z. -E. Meziani</a>, <a href="/search/nucl-ex?searchtype=author&query=Ma%2C+B+-">B. -Q. Ma</a>, <a href="/search/nucl-ex?searchtype=author&query=Mao%2C+Y+J">Y. J. Mao</a>, <a href="/search/nucl-ex?searchtype=author&query=Peng%2C+J+-">J. -C. Peng</a>, <a href="/search/nucl-ex?searchtype=author&query=Prokudin%2C+A">A. Prokudin</a>, <a href="/search/nucl-ex?searchtype=author&query=Schlegel%2C+M">M. Schlegel</a> , et al. (4 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1009.3803v3-abstract-short" style="display: inline;"> Jefferson Lab (JLab) 12 GeV energy upgrade provides a golden opportunity to perform precision studies of the transverse spin and transverse-momentum-dependent structure in the valence quark region for both the proton and the neutron. In this paper, we focus our discussion on a recently approved experiment on the neutron as an example of the precision studies planned at JLab. The new experiment wil… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1009.3803v3-abstract-full').style.display = 'inline'; document.getElementById('1009.3803v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1009.3803v3-abstract-full" style="display: none;"> Jefferson Lab (JLab) 12 GeV energy upgrade provides a golden opportunity to perform precision studies of the transverse spin and transverse-momentum-dependent structure in the valence quark region for both the proton and the neutron. In this paper, we focus our discussion on a recently approved experiment on the neutron as an example of the precision studies planned at JLab. The new experiment will perform precision measurements of target Single Spin Asymmetries (SSA) from semi-inclusive electro-production of charged pions from a 40-cm long transversely polarized $^3$He target in Deep-Inelastic-Scattering kinematics using 11 and 8.8 GeV electron beams. This new coincidence experiment in Hall A will employ a newly proposed solenoid spectrometer (SoLID). The large acceptance spectrometer and the high polarized luminosity will provide precise 4-D ($x$, $z$, $P_T$ and $Q^2$) data on the Collins, Sivers, and pretzelocity asymmetries for the neutron through the azimuthal angular dependence. The full 2$蟺$ azimuthal angular coverage in the lab is essential in controlling the systematic uncertainties. The results from this experiment, when combined with the proton Collins asymmetry measurement and the Collins fragmentation function determined from the e$^+$e$^-$ collision data, will allow for a quark flavor separation in order to achieve a determination of the tensor charge of the d quark to a 10% accuracy. The extracted Sivers and pretzelocity asymmetries will provide important information to understand the correlations between the quark orbital angular momentum and the nucleon spin and between the quark spin and nucleon spin. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1009.3803v3-abstract-full').style.display = 'none'; document.getElementById('1009.3803v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 January, 2011; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 September, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2010. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">23 pages, 13 figures, minor corrections, matches published version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur.Phys.J.Plus 126:2,2011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1008.1738">arXiv:1008.1738</a> <span> [<a href="https://arxiv.org/pdf/1008.1738">pdf</a>, <a href="https://arxiv.org/format/1008.1738">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.105.262302">10.1103/PhysRevLett.105.262302 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurements of the Electric Form Factor of the Neutron up to Q2=3.4 GeV2 using the Reaction He3(e,e'n)pp </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Riordan%2C+S">S. Riordan</a>, <a href="/search/nucl-ex?searchtype=author&query=Abrahamyan%2C+S">S. Abrahamyan</a>, <a href="/search/nucl-ex?searchtype=author&query=Craver%2C+B">B. Craver</a>, <a href="/search/nucl-ex?searchtype=author&query=Kelleher%2C+A">A. Kelleher</a>, <a href="/search/nucl-ex?searchtype=author&query=Kolarkar%2C+A">A. Kolarkar</a>, <a href="/search/nucl-ex?searchtype=author&query=Miller%2C+J">J. Miller</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Liyanage%2C+N">N. Liyanage</a>, <a href="/search/nucl-ex?searchtype=author&query=Wojtsekhowski%2C+B">B. Wojtsekhowski</a>, <a href="/search/nucl-ex?searchtype=author&query=Acha%2C+A">A. Acha</a>, <a href="/search/nucl-ex?searchtype=author&query=Allada%2C+K">K. Allada</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+B">B. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K+A">K. A. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J+R+M">J. R. M. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Arrington%2C+J">J. Arrington</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Beck%2C+A">A. Beck</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellis%2C+M">M. Bellis</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Breuer%2C+H">H. Breuer</a>, <a href="/search/nucl-ex?searchtype=author&query=Calarco%2C+J+R">J. R. Calarco</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+P">J. P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Coman%2C+L">L. Coman</a> , et al. (93 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1008.1738v2-abstract-short" style="display: inline;"> The electric form factor of the neutron was determined from studies of the reaction He3(e,e'n)pp in quasi-elastic kinematics in Hall A at Jefferson Lab. Longitudinally polarized electrons were scattered off a polarized target in which the nuclear polarization was oriented perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with ne… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1008.1738v2-abstract-full').style.display = 'inline'; document.getElementById('1008.1738v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1008.1738v2-abstract-full" style="display: none;"> The electric form factor of the neutron was determined from studies of the reaction He3(e,e'n)pp in quasi-elastic kinematics in Hall A at Jefferson Lab. Longitudinally polarized electrons were scattered off a polarized target in which the nuclear polarization was oriented perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons that were registered in a large-solid-angle detector. More than doubling the Q2-range over which it is known, we find GEn = 0.0225 +/- 0.0017 (stat) +/- 0.0024 (syst), 0.0200 +/- 0.0023 +/- 0.0018, and 0.0142 +/- 0.0019 +/- 0.0013 for Q2 = 1.72, 2.48, and 3.41 GeV2, respectively. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1008.1738v2-abstract-full').style.display = 'none'; document.getElementById('1008.1738v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 November, 2010; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 August, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2010. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">submitted to PRL</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett.105:262302,2010 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0911.3647">arXiv:0911.3647</a> <span> [<a href="https://arxiv.org/pdf/0911.3647">pdf</a>, <a href="https://arxiv.org/format/0911.3647">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epja/i2010-10932-0">10.1140/epja/i2010-10932-0 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A High-Pressure Polarized $^3$He Gas Target for Nuclear Physics Experiments Using A Polarized Photon Beam </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Ye%2C+Q">Q. Ye</a>, <a href="/search/nucl-ex?searchtype=author&query=Laskaris%2C+G">G. Laskaris</a>, <a href="/search/nucl-ex?searchtype=author&query=Gao%2C+H">H. Gao</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+W">W. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Zheng%2C+W">W. Zheng</a>, <a href="/search/nucl-ex?searchtype=author&query=Zong%2C+X">X. Zong</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Tobias%2C+W+A">W. A. Tobias</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0911.3647v2-abstract-short" style="display: inline;"> Following the first experiment on three-body photodisintegration of polarized $^3$He utilizing circularly polarized photons from High Intensity Gamma Source (HI$纬$S) at Duke Free Electron Laser Laboratory (DFELL), a new high-pressure polarized $^3$He target cell made of pyrex glass coated with a thin layer of sol-gel doped with aluminum nitrate nonahydrate has been built in order to reduce the p… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0911.3647v2-abstract-full').style.display = 'inline'; document.getElementById('0911.3647v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0911.3647v2-abstract-full" style="display: none;"> Following the first experiment on three-body photodisintegration of polarized $^3$He utilizing circularly polarized photons from High Intensity Gamma Source (HI$纬$S) at Duke Free Electron Laser Laboratory (DFELL), a new high-pressure polarized $^3$He target cell made of pyrex glass coated with a thin layer of sol-gel doped with aluminum nitrate nonahydrate has been built in order to reduce the photon beam induced background. The target is based on the technique of spin-exchange optical pumping of hybrid rubidium and potassium and the highest polarization achieved is $\sim$62% determined from both NMR-AFP and EPR polarimetry. The $X$ parameter is estimated to be $\sim0.06$ and the performance of the target is in good agreement with theoretical predictions. We also present beam test results from this new target cell and the comparison with the GE180 $^3$He target cell used previously at HI$纬$S. This is the first time that sol-gel coating technique has been used in a polarized $^3$He target for nuclear physics experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0911.3647v2-abstract-full').style.display = 'none'; document.getElementById('0911.3647v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 December, 2009; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 November, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2009. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur.Phys.J.A44:55-61,2010 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0803.3845">arXiv:0803.3845</a> <span> [<a href="https://arxiv.org/pdf/0803.3845">pdf</a>, <a href="https://arxiv.org/ps/0803.3845">ps</a>, <a href="https://arxiv.org/format/0803.3845">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.101.182502">10.1103/PhysRevLett.101.182502 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Quark-Hadron Duality in Neutron (3He) Spin Structure </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Solvignon%2C+P">P. Solvignon</a>, <a href="/search/nucl-ex?searchtype=author&query=Liyanage%2C+N">N. Liyanage</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Choi%2C+S">Seonho Choi</a>, <a href="/search/nucl-ex?searchtype=author&query=Aniol%2C+K">K. Aniol</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Boeglin%2C+W">W. Boeglin</a>, <a href="/search/nucl-ex?searchtype=author&query=Camsonne%2C+A">A. Camsonne</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G+D">G. D. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chang%2C+G">G. Chang</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Craver%2C+B">B. Craver</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=Dutta%2C+D">D. Dutta</a>, <a href="/search/nucl-ex?searchtype=author&query=Ent%2C+R">R. Ent</a>, <a href="/search/nucl-ex?searchtype=author&query=Feuerbach%2C+R">R. Feuerbach</a>, <a href="/search/nucl-ex?searchtype=author&query=Frullani%2C+S">S. Frullani</a>, <a href="/search/nucl-ex?searchtype=author&query=Gao%2C+H">H. Gao</a>, <a href="/search/nucl-ex?searchtype=author&query=Garibaldi%2C+F">F. Garibaldi</a>, <a href="/search/nucl-ex?searchtype=author&query=Gilman%2C+R">R. Gilman</a>, <a href="/search/nucl-ex?searchtype=author&query=Glashausser%2C+C">C. Glashausser</a>, <a href="/search/nucl-ex?searchtype=author&query=Gorbenko%2C+V">V. Gorbenko</a>, <a href="/search/nucl-ex?searchtype=author&query=Hansen%2C+O">O. Hansen</a>, <a href="/search/nucl-ex?searchtype=author&query=Higinbotham%2C+D+W">D. W. Higinbotham</a> , et al. (37 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0803.3845v2-abstract-short" style="display: inline;"> We present experimental results of the first high-precision test of quark-hadron duality in the spin-structure function g_1 of the neutron and $^3$He using a polarized 3He target in the four-momentum-transfer-squared range from 0.7 to 4.0 (GeV/c)^2. Global duality is observed for the spin-structure function g_1 down to at least Q^2 = 1.8 (GeV/c)^2 in both targets. We have also formed the photon-… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0803.3845v2-abstract-full').style.display = 'inline'; document.getElementById('0803.3845v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0803.3845v2-abstract-full" style="display: none;"> We present experimental results of the first high-precision test of quark-hadron duality in the spin-structure function g_1 of the neutron and $^3$He using a polarized 3He target in the four-momentum-transfer-squared range from 0.7 to 4.0 (GeV/c)^2. Global duality is observed for the spin-structure function g_1 down to at least Q^2 = 1.8 (GeV/c)^2 in both targets. We have also formed the photon-nucleon asymmetry A_1 in the resonance region for 3He and found no strong Q^2-dependence above 2.2 (GeV/c)^2. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0803.3845v2-abstract-full').style.display = 'none'; document.getElementById('0803.3845v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 October, 2008; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 March, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2008. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett.101:182502,2008 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0803.2267">arXiv:0803.2267</a> <span> [<a href="https://arxiv.org/pdf/0803.2267">pdf</a>, <a href="https://arxiv.org/ps/0803.2267">ps</a>, <a href="https://arxiv.org/format/0803.2267">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.101.022303">10.1103/PhysRevLett.101.022303 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> 3He Spin-Dependent Cross Sections and Sum Rules </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=E94010+Collaboration"> E94010 Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Slifer%2C+K">K. Slifer</a>, <a href="/search/nucl-ex?searchtype=author&query=Amarian%2C+M">M. Amarian</a>, <a href="/search/nucl-ex?searchtype=author&query=Auerbach%2C+L">L. Auerbach</a>, <a href="/search/nucl-ex?searchtype=author&query=Averett%2C+T">T. Averett</a>, <a href="/search/nucl-ex?searchtype=author&query=Berthot%2C+J">J. Berthot</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertin%2C+P">P. Bertin</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+B">B. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Black%2C+T">T. Black</a>, <a href="/search/nucl-ex?searchtype=author&query=Brash%2C+E">E. Brash</a>, <a href="/search/nucl-ex?searchtype=author&query=Brown%2C+D">D. Brown</a>, <a href="/search/nucl-ex?searchtype=author&query=Burtin%2C+E">E. Burtin</a>, <a href="/search/nucl-ex?searchtype=author&query=Calarco%2C+J">J. Calarco</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G">G. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chai%2C+Z">Z. Chai</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+-">J. -P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Choi%2C+S">Seonho Choi</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Atti%2C+C+C+d">C. Ciofi degli Atti</a>, <a href="/search/nucl-ex?searchtype=author&query=Cisbani%2C+E">E. Cisbani</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=Deur%2C+A">A. Deur</a>, <a href="/search/nucl-ex?searchtype=author&query=DiSalvo%2C+R">R. DiSalvo</a>, <a href="/search/nucl-ex?searchtype=author&query=Dieterich%2C+S">S. Dieterich</a>, <a href="/search/nucl-ex?searchtype=author&query=Djawotho%2C+P">P. Djawotho</a> , et al. (88 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="0803.2267v4-abstract-short" style="display: inline;"> We present a measurement of the spin-dependent cross sections for the \vec{^3He}(\vec{e},e')X} reaction in the quasielastic and resonance regions at four-momentum transfer 0.1 < Q^2< 0.9 GeV^2. The spin-structure functions have been extracted and used to evaluate the nuclear Burkhardt--Cottingham and extended GDH sum rules for the first time. Impulse approximation and exact three-body Faddeev ca… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0803.2267v4-abstract-full').style.display = 'inline'; document.getElementById('0803.2267v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0803.2267v4-abstract-full" style="display: none;"> We present a measurement of the spin-dependent cross sections for the \vec{^3He}(\vec{e},e')X} reaction in the quasielastic and resonance regions at four-momentum transfer 0.1 < Q^2< 0.9 GeV^2. The spin-structure functions have been extracted and used to evaluate the nuclear Burkhardt--Cottingham and extended GDH sum rules for the first time. Impulse approximation and exact three-body Faddeev calculations are also compared to the data in the quasielastic region. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0803.2267v4-abstract-full').style.display = 'none'; document.getElementById('0803.2267v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 July, 2008; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 March, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2008. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Final version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett.101:022303,2008 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/hep-ex/0609025">arXiv:hep-ex/0609025</a> <span> [<a href="https://arxiv.org/pdf/hep-ex/0609025">pdf</a>, <a href="https://arxiv.org/ps/hep-ex/0609025">ps</a>, <a href="https://arxiv.org/format/hep-ex/0609025">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.75.055208">10.1103/PhysRevC.75.055208 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Search for Sigma^0_5, N^0_5 and Theta^++ Pentaquark States </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Qiang%2C+Y">Y. Qiang</a>, <a href="/search/nucl-ex?searchtype=author&query=Annand%2C+J">J. Annand</a>, <a href="/search/nucl-ex?searchtype=author&query=Arrington%2C+J">J. Arrington</a>, <a href="/search/nucl-ex?searchtype=author&query=Azimov%2C+Y+I">Ya. I. Azimov</a>, <a href="/search/nucl-ex?searchtype=author&query=Bertozzi%2C+W">W. Bertozzi</a>, <a href="/search/nucl-ex?searchtype=author&query=Cates%2C+G">G. Cates</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+J+P">J. P. Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Choi%2C+S">Seonho Choi</a>, <a href="/search/nucl-ex?searchtype=author&query=Chudakov%2C+E">E. Chudakov</a>, <a href="/search/nucl-ex?searchtype=author&query=Cusanno%2C+F">F. Cusanno</a>, <a href="/search/nucl-ex?searchtype=author&query=de+Jager%2C+C+W">C. W. de Jager</a>, <a href="/search/nucl-ex?searchtype=author&query=Epstein%2C+M">M. Epstein</a>, <a href="/search/nucl-ex?searchtype=author&query=Feuerbach%2C+R+J">R. J. Feuerbach</a>, <a href="/search/nucl-ex?searchtype=author&query=Garibaldi%2C+F">F. Garibaldi</a>, <a href="/search/nucl-ex?searchtype=author&query=Gayou%2C+O">O. Gayou</a>, <a href="/search/nucl-ex?searchtype=author&query=Gilman%2C+R">R. Gilman</a>, <a href="/search/nucl-ex?searchtype=author&query=Gomez%2C+J">J. Gomez</a>, <a href="/search/nucl-ex?searchtype=author&query=Hamilton%2C+D+J">D. J. Hamilton</a>, <a href="/search/nucl-ex?searchtype=author&query=Hansen%2C+J+-">J. -O. Hansen</a>, <a href="/search/nucl-ex?searchtype=author&query=Higinbotham%2C+D+W">D. W. Higinbotham</a>, <a href="/search/nucl-ex?searchtype=author&query=Holmstrom%2C+T">T. Holmstrom</a>, <a href="/search/nucl-ex?searchtype=author&query=Iodice%2C+M">M. Iodice</a>, <a href="/search/nucl-ex?searchtype=author&query=Jiang%2C+X">X. Jiang</a>, <a href="/search/nucl-ex?searchtype=author&query=Jones%2C+M">M. Jones</a>, <a href="/search/nucl-ex?searchtype=author&query=LeRose%2C+J">J. LeRose</a> , et al. (29 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="hep-ex/0609025v2-abstract-short" style="display: inline;"> A high-resolution (sigma_instr. = 1.5 MeV) search for narrow states (Gamma < 10 MeV) with masses of M_x approx 1500-1850 MeV in ep -> e'K^+ X, e'K^- X and e' pi^+ X electroproduction at small angles and low Q^2 was performed. These states would be candidate partner states of the reported Theta^+(1540) pentaquark. No statistically significant signal was observed in any of the channels at 90% C.L.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ex/0609025v2-abstract-full').style.display = 'inline'; document.getElementById('hep-ex/0609025v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="hep-ex/0609025v2-abstract-full" style="display: none;"> A high-resolution (sigma_instr. = 1.5 MeV) search for narrow states (Gamma < 10 MeV) with masses of M_x approx 1500-1850 MeV in ep -> e'K^+ X, e'K^- X and e' pi^+ X electroproduction at small angles and low Q^2 was performed. These states would be candidate partner states of the reported Theta^+(1540) pentaquark. No statistically significant signal was observed in any of the channels at 90% C.L. Upper limits on forward production were determined to be between 0.7% and 4.2% of the Lambda(1520) production cross section, depending on the channel and the assumed mass and width of the state. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ex/0609025v2-abstract-full').style.display = 'none'; document.getElementById('hep-ex/0609025v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 May, 2007; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 September, 2006; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2006. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 5 figures, to appear in Phys. Rev. C, update with responses to referee suggestions</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.C75:055208,2007 </p> </li> </ol> <nav class="pagination is-small is-centered breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Cates%2C+G&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Cates%2C+G&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Cates%2C+G&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> </ul> </nav> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg> <a href="https://info.arxiv.org/help/contact.html"> Contact</a> </li> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>subscribe to arXiv mailings</title><desc>Click here to subscribe</desc><path d="M476 3.2L12.5 270.6c-18.1 10.4-15.8 35.6 2.2 43.2L121 358.4l287.3-253.2c5.5-4.9 13.3 2.6 8.6 8.3L176 407v80.5c0 23.6 28.5 32.9 42.5 15.8L282 426l124.6 52.2c14.2 6 30.4-2.9 33-18.2l72-432C515 7.8 493.3-6.8 476 3.2z"/></svg> <a href="https://info.arxiv.org/help/subscribe"> Subscribe</a> </li> </ul> </div> </div> </div>   <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/license/index.html">Copyright</a></li> <li><a href="https://info.arxiv.org/help/policies/privacy_policy.html">Privacy Policy</a></li> </ul> </div> <div class="column sorry-app-links"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/web_accessibility.html">Web Accessibility Assistance</a></li> <li> <p class="help"> <a class="a11y-main-link" href="https://status.arxiv.org" target="_blank">arXiv Operational Status <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 512" class="icon filter-dark_grey" role="presentation"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z"/></svg></a><br> Get status notifications via <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/email/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg>email</a> or <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/slack/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="icon filter-black" role="presentation"><path d="M94.12 315.1c0 25.9-21.16 47.06-47.06 47.06S0 341 0 315.1c0-25.9 21.16-47.06 47.06-47.06h47.06v47.06zm23.72 0c0-25.9 21.16-47.06 47.06-47.06s47.06 21.16 47.06 47.06v117.84c0 25.9-21.16 47.06-47.06 47.06s-47.06-21.16-47.06-47.06V315.1zm47.06-188.98c-25.9 0-47.06-21.16-47.06-47.06S139 32 164.9 32s47.06 21.16 47.06 47.06v47.06H164.9zm0 23.72c25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06H47.06C21.16 243.96 0 222.8 0 196.9s21.16-47.06 47.06-47.06H164.9zm188.98 47.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06h-47.06V196.9zm-23.72 0c0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06V79.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06V196.9zM283.1 385.88c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06v-47.06h47.06zm0-23.72c-25.9 0-47.06-21.16-47.06-47.06 0-25.9 21.16-47.06 47.06-47.06h117.84c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06H283.1z"/></svg>slack</a> </p> </li> </ul> </div> </div> </div>  </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>

CINXE.COM

Search | arXiv e-print repository