Search for Excited Tau Leptons in pp Collisions at √? = 13 TeV at the LHC

<!DOCTYPE html> <html lang="en" class="no-js"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes"> <div class="react-head-temp"> <title>Search for Excited Tau Leptons in pp Collisions at √? = 13 TeV at the LHC</title> <meta id="meta-title" property="citation_title" content="Search for Excited Tau Leptons in pp Collisions at √? = 13 TeV at the LHC"/> <meta id="og-title" property="og:title" content="Search for Excited Tau Leptons in pp Collisions at √? = 13 TeV at the LHC"/> <meta name="twitter:widgets:autoload" content="off"/> <meta name="twitter:dnt" content="on"/> <meta name="twitter:widgets:csp" content="on"/> <meta name="google-site-verification" content="lQbRRf0vgPqMbnbCsgELjAjIIyJjiIWo917M7hBshvI"/> <meta id="meta-abstract" name="citation_abstract" content="This dissertation details the context and methods involved in the analysis conducted to searchfor excited tau leptons (τ∗) using data collected during Run II of the Large Hadron Collider (LHC) by the Compact Muon Solenoid (CMS) experiment. The dataset used corresponds to 138 fb−1 of integrated luminosity in proton-proton collisions at 13 TeV center-of-mass energy. The analysis selects events with two tau candidates, at least one of which is a hadronic decay, and a high energy photon. The mass of the excited tau lepton is reconstructed by also accounting for the contribution from the invisible neutrino component. Expected limits are set at 95% confidence level excluding mτ∗ up to 4.5 TeV for a compositeness scale equal to the mass of the τ∗ and up to 2.75 TeV for a compositeness scale of 10 TeV."/> <meta id="meta-description" name="description" content="Author(s): Welton, Troy | Advisor(s): Conway, John | Abstract: This dissertation details the context and methods involved in the analysis conducted to searchfor excited tau leptons (τ∗) using data collected during Run II of the Large Hadron Collider (LHC) by the Compact Muon Solenoid (CMS) experiment. The dataset used corresponds to 138 fb−1 of integrated luminosity in proton-proton collisions at 13 TeV center-of-mass energy. The analysis selects events with two tau candidates, at least one of which is a hadronic decay, and a high energy photon. The mass of the excited tau lepton is reconstructed by also accounting for the contribution from the invisible neutrino component. Expected limits are set at 95% confidence level excluding mτ∗ up to 4.5 TeV for a compositeness scale equal to the mass of the τ∗ and up to 2.75 TeV for a compositeness scale of 10 TeV."/> <meta id="og-description" name="og:description" content="Author(s): Welton, Troy | Advisor(s): Conway, John | Abstract: This dissertation details the context and methods involved in the analysis conducted to searchfor excited tau leptons (τ∗) using data collected during Run II of the Large Hadron Collider (LHC) by the Compact Muon Solenoid (CMS) experiment. The dataset used corresponds to 138 fb−1 of integrated luminosity in proton-proton collisions at 13 TeV center-of-mass energy. The analysis selects events with two tau candidates, at least one of which is a hadronic decay, and a high energy photon. The mass of the excited tau lepton is reconstructed by also accounting for the contribution from the invisible neutrino component. Expected limits are set at 95% confidence level excluding mτ∗ up to 4.5 TeV for a compositeness scale equal to the mass of the τ∗ and up to 2.75 TeV for a compositeness scale of 10 TeV."/> <meta id="og-image" property="og:image" content="https://escholarship.org/images/escholarship-facebook2.jpg"/> <meta id="og-image-width" property="og:image:width" content="1242"/> <meta id="og-image-height" property="og:image:height" content="1242"/> <meta id="meta-author0" name="citation_author" content="Welton, Troy"/> <meta id="meta-publication_date" name="citation_publication_date" content="2022"/> <meta id="meta-dissertation_institution" name="citation_dissertation_institution" content="UC Davis"/> <meta id="meta-online_date" name="citation_online_date" content="2023-06-30"/> <meta id="meta-pdf_url" name="citation_pdf_url" content="https://escholarship.org/content/qt7wj216w6/qt7wj216w6.pdf?t=rx2g60"/> <link rel="canonical" href="https://escholarship.org/uc/item/7wj216w6"/> </div> <link 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href="/search/?q=author%3AWelton%2C%20Troy">Welton, Troy</a> </li><li class="c-authorlist__begin"><span class="c-authorlist__heading">Advisor(s):</span> <a href="/search/?q=author%3AConway%2C%20John">Conway, John</a> </li></ul></div><div class="c-tabs"><div class="c-tabs__tabs"><button class="c-tabs__button-more" aria-label="Show all tabs">...</button><button class="c-tabs__button--active">Main Content</button><button class="c-tabs__button">Metrics</button><button class="c-tabs__button">Author & Article Info</button></div><div class="c-tabs__content"><div class="c-tabcontent"><a name="article_abstract"></a><details class="c-togglecontent" open=""><summary>Abstract</summary><div class="c-clientmarkup"><p>This dissertation details the context and methods involved in the analysis conducted to searchfor excited tau leptons (τ∗) using data collected during Run II of the Large Hadron Collider (LHC) by the Compact Muon Solenoid (CMS) experiment. The dataset used corresponds to 138 fb−1 of integrated luminosity in proton-proton collisions at 13 TeV center-of-mass energy. The analysis selects events with two tau candidates, at least one of which is a hadronic decay, and a high energy photon. The mass of the excited tau lepton is reconstructed by also accounting for the contribution from the invisible neutrino component. Expected limits are set at 95% confidence level excluding mτ∗ up to 4.5 TeV for a compositeness scale equal to the mass of the τ∗ and up to 2.75 TeV for a compositeness scale of 10 TeV.</p></div></details><details class="c-togglecontent" open=""><a name="article_main"></a><summary>Main Content</summary><div class="c-pdfview"><button class="c-pdfview__button-download">Download PDF to View</button><button class="c-pdfview__button-view">View Larger</button></div><div class="c-pdfview__accessibility">For improved accessibility of PDF content, <a href="/content/qt7wj216w6/qt7wj216w6.pdf?t=rx2g60">download the file</a> to your device.</div><div class="c-pdfview__viewer"><div id="pdfjs-cdl-wrapper"> <div id="pdfjs-viewer" className="jsonly"> <noscript> <embed src=/content/qt7wj216w6/qt7wj216w6_noSplash_6af40916079425ea8fbf385044644eff.pdf?t=rx2g60 type='application/pdf' /> </noscript> <div id="outerContainer"> <div id="sidebarContainer"> <div id="toolbarSidebar"> <div 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Search for Excited Tau Leptons in pp Collisions at √? = 13 TeV at the LHC