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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <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/2007.14491">arXiv:2007.14491</a> <span> [<a href="https://arxiv.org/pdf/2007.14491">pdf</a>, <a href="https://arxiv.org/format/2007.14491">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="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> <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/10.1088/1361-6471/abf3ba">10.1088/1361-6471/abf3ba <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Large Hadron-Electron Collider at the HL-LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Agostini%2C+P">P. Agostini</a>, <a href="/search/hep-ph?searchtype=author&query=Aksakal%2C+H">H. Aksakal</a>, <a href="/search/hep-ph?searchtype=author&query=Alekhin%2C+S">S. Alekhin</a>, <a href="/search/hep-ph?searchtype=author&query=Allport%2C+P+P">P. P. Allport</a>, <a href="/search/hep-ph?searchtype=author&query=Andari%2C+N">N. Andari</a>, <a href="/search/hep-ph?searchtype=author&query=Andre%2C+K+D+J">K. D. J. Andre</a>, <a href="/search/hep-ph?searchtype=author&query=Angal-Kalinin%2C+D">D. Angal-Kalinin</a>, <a href="/search/hep-ph?searchtype=author&query=Antusch%2C+S">S. Antusch</a>, <a href="/search/hep-ph?searchtype=author&query=Bella%2C+L+A">L. Aperio Bella</a>, <a href="/search/hep-ph?searchtype=author&query=Apolinario%2C+L">L. Apolinario</a>, <a href="/search/hep-ph?searchtype=author&query=Apsimon%2C+R">R. Apsimon</a>, <a href="/search/hep-ph?searchtype=author&query=Apyan%2C+A">A. Apyan</a>, <a href="/search/hep-ph?searchtype=author&query=Arduini%2C+G">G. Arduini</a>, <a href="/search/hep-ph?searchtype=author&query=Ari%2C+V">V. Ari</a>, <a href="/search/hep-ph?searchtype=author&query=Armbruster%2C+A">A. Armbruster</a>, <a href="/search/hep-ph?searchtype=author&query=Armesto%2C+N">N. Armesto</a>, <a href="/search/hep-ph?searchtype=author&query=Auchmann%2C+B">B. Auchmann</a>, <a href="/search/hep-ph?searchtype=author&query=Aulenbacher%2C+K">K. Aulenbacher</a>, <a href="/search/hep-ph?searchtype=author&query=Azuelos%2C+G">G. Azuelos</a>, <a href="/search/hep-ph?searchtype=author&query=Backovic%2C+S">S. Backovic</a>, <a href="/search/hep-ph?searchtype=author&query=Bailey%2C+I">I. Bailey</a>, <a href="/search/hep-ph?searchtype=author&query=Bailey%2C+S">S. Bailey</a>, <a href="/search/hep-ph?searchtype=author&query=Balli%2C+F">F. Balli</a>, <a href="/search/hep-ph?searchtype=author&query=Behera%2C+S">S. Behera</a>, <a href="/search/hep-ph?searchtype=author&query=Behnke%2C+O">O. Behnke</a> , et al. (312 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="2007.14491v2-abstract-short" style="display: inline;"> The Large Hadron electron Collider (LHeC) is designed to move the field of deep inelastic scattering (DIS) to the energy and intensity frontier of particle physics. Exploiting energy recovery technology, it collides a novel, intense electron beam with a proton or ion beam from the High Luminosity--Large Hadron Collider (HL-LHC). The accelerator and interaction region are designed for concurrent el… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.14491v2-abstract-full').style.display = 'inline'; document.getElementById('2007.14491v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.14491v2-abstract-full" style="display: none;"> The Large Hadron electron Collider (LHeC) is designed to move the field of deep inelastic scattering (DIS) to the energy and intensity frontier of particle physics. Exploiting energy recovery technology, it collides a novel, intense electron beam with a proton or ion beam from the High Luminosity--Large Hadron Collider (HL-LHC). The accelerator and interaction region are designed for concurrent electron-proton and proton-proton operation. This report represents an update of the Conceptual Design Report (CDR) of the LHeC, published in 2012. It comprises new results on parton structure of the proton and heavier nuclei, QCD dynamics, electroweak and top-quark physics. It is shown how the LHeC will open a new chapter of nuclear particle physics in extending the accessible kinematic range in lepton-nucleus scattering by several orders of magnitude. Due to enhanced luminosity, large energy and the cleanliness of the hadronic final states, the LHeC has a strong Higgs physics programme and its own discovery potential for new physics. Building on the 2012 CDR, the report represents a detailed updated design of the energy recovery electron linac (ERL) including new lattice, magnet, superconducting radio frequency technology and further components. Challenges of energy recovery are described and the lower energy, high current, 3-turn ERL facility, PERLE at Orsay, is presented which uses the LHeC characteristics serving as a development facility for the design and operation of the LHeC. An updated detector design is presented corresponding to the acceptance, resolution and calibration goals which arise from the Higgs and parton density function physics programmes. The paper also presents novel results on the Future Circular Collider in electron-hadron mode, FCC-eh, which utilises the same ERL technology to further extend the reach of DIS to even higher centre-of-mass energies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.14491v2-abstract-full').style.display = 'none'; document.getElementById('2007.14491v2-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 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">373 pages, many figures, to be published by J. Phys. G</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-ACC-Note-2020-0002 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J.Phys.G 48 (2021) 11, 110501 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1808.08623">arXiv:1808.08623</a> <span> [<a href="https://arxiv.org/pdf/1808.08623">pdf</a>, <a href="https://arxiv.org/format/1808.08623">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> </div> </div> <p class="title is-5 mathjax"> xFitter 2.0.0: Heavy quark matching scales: Unifying the FFNS and VFNS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Team%2C+T+x+D">The xFitter Developers' Team</a>, <a href="/search/hep-ph?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ph?searchtype=author&query=Bertone%2C+V">V. Bertone</a>, <a href="/search/hep-ph?searchtype=author&query=Britzger%2C+D">D. Britzger</a>, <a href="/search/hep-ph?searchtype=author&query=Camarda%2C+S">S. Camarda</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A">A. Cooper-Sarkar</a>, <a href="/search/hep-ph?searchtype=author&query=Geiser%2C+A">A. Geiser</a>, <a href="/search/hep-ph?searchtype=author&query=Giuli%2C+F">F. Giuli</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">A. Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Godat%2C+E">E. Godat</a>, <a href="/search/hep-ph?searchtype=author&query=Kusina%2C+A">A. Kusina</a>, <a href="/search/hep-ph?searchtype=author&query=Luszczak%2C+A">A. Luszczak</a>, <a href="/search/hep-ph?searchtype=author&query=Lyonnet%2C+F">F. Lyonnet</a>, <a href="/search/hep-ph?searchtype=author&query=Olness%2C+F">F. Olness</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</a>, <a href="/search/hep-ph?searchtype=author&query=Radescu%2C+V">V. Radescu</a>, <a href="/search/hep-ph?searchtype=author&query=Schienbein%2C+I">I. Schienbein</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">O. Zenaiev</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="1808.08623v1-abstract-short" style="display: inline;"> xFitter is an open-source package that provides a framework for the determination of the parton distribution functions (PDFs) of the proton for many different kinds of analyses in Quantum Chromodynamics (QCD). It incorporates experimental data from a wide range of experiments including fixed-target, Tevatron, HERA, and LHC. xFitter version 2.0.0 has recently been released, and offers an expanded s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.08623v1-abstract-full').style.display = 'inline'; document.getElementById('1808.08623v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1808.08623v1-abstract-full" style="display: none;"> xFitter is an open-source package that provides a framework for the determination of the parton distribution functions (PDFs) of the proton for many different kinds of analyses in Quantum Chromodynamics (QCD). It incorporates experimental data from a wide range of experiments including fixed-target, Tevatron, HERA, and LHC. xFitter version 2.0.0 has recently been released, and offers an expanded set of tools and options. The new xFitter 2.0.0 program links to the APFEL code which has implemented generalized matching conditions that enable the switch from $N_F$ to $N_F+1$ active flavors at an arbitrary matching scale $渭_m$. This enables us to generalize the transition between a FFNS and a VFNS and essentially vary continuously between the two schemes; in this sense the matching scale $渭_m$ allows us to unify the FFNS and VFNS in a common framework. This paper provides a brief overview of xFitter with emphasis of these new features. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.08623v1-abstract-full').style.display = 'none'; document.getElementById('1808.08623v1-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 August, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">6 pages, 5 figures. DIS2018 Workshop, Kobe, Japan</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1709.07251">arXiv:1709.07251</a> <span> [<a href="https://arxiv.org/pdf/1709.07251">pdf</a>, <a href="https://arxiv.org/format/1709.07251">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="High Energy Physics - Phenomenology">hep-ph</span> </div> </div> <p class="title is-5 mathjax"> Determination of the strong coupling constant $伪_s(M_Z)$ in next-to-next-to-leading order QCD using H1 jet cross section measurements </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=H1+collaboration"> H1 collaboration</a>, <a href="/search/hep-ph?searchtype=author&query=Andreev%2C+V">V. Andreev</a>, <a href="/search/hep-ph?searchtype=author&query=Baghdasaryan%2C+A">A. Baghdasaryan</a>, <a href="/search/hep-ph?searchtype=author&query=Begzsuren%2C+K">K. Begzsuren</a>, <a href="/search/hep-ph?searchtype=author&query=Belousov%2C+A">A. Belousov</a>, <a href="/search/hep-ph?searchtype=author&query=Bertone%2C+V">V. Bertone</a>, <a href="/search/hep-ph?searchtype=author&query=Bolz%2C+A">A. Bolz</a>, <a href="/search/hep-ph?searchtype=author&query=Boudry%2C+V">V. Boudry</a>, <a href="/search/hep-ph?searchtype=author&query=Brandt%2C+G">G. Brandt</a>, <a href="/search/hep-ph?searchtype=author&query=Brisson%2C+V">V. Brisson</a>, <a href="/search/hep-ph?searchtype=author&query=Britzger%2C+D">D. Britzger</a>, <a href="/search/hep-ph?searchtype=author&query=Buniatyan%2C+A">A. Buniatyan</a>, <a href="/search/hep-ph?searchtype=author&query=Bylinkin%2C+A">A. Bylinkin</a>, <a href="/search/hep-ph?searchtype=author&query=Bystritskaya%2C+L">L. Bystritskaya</a>, <a href="/search/hep-ph?searchtype=author&query=Campbell%2C+A+J">A. J. Campbell</a>, <a href="/search/hep-ph?searchtype=author&query=Avila%2C+K+B+C">K. B. Cantun Avila</a>, <a href="/search/hep-ph?searchtype=author&query=Cerny%2C+K">K. Cerny</a>, <a href="/search/hep-ph?searchtype=author&query=Chekelian%2C+V">V. Chekelian</a>, <a href="/search/hep-ph?searchtype=author&query=Contreras%2C+J+G">J. G. Contreras</a>, <a href="/search/hep-ph?searchtype=author&query=Cvach%2C+J">J. Cvach</a>, <a href="/search/hep-ph?searchtype=author&query=Currie%2C+J">J. Currie</a>, <a href="/search/hep-ph?searchtype=author&query=Dainton%2C+J+B">J. B. Dainton</a>, <a href="/search/hep-ph?searchtype=author&query=Daum%2C+K">K. Daum</a>, <a href="/search/hep-ph?searchtype=author&query=Diaconu%2C+C">C. Diaconu</a>, <a href="/search/hep-ph?searchtype=author&query=Dobre%2C+M">M. Dobre</a> , et al. (123 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="1709.07251v2-abstract-short" style="display: inline;"> The strong coupling constant $伪_s(M_Z)$ is determined from inclusive jet and dijet cross sections in neutral-current deep-inelastic $ep$ scattering (DIS) measured at HERA by the H1 collaboration using next-to-next-to-leading order (NNLO) QCD predictions. The dependence of the NNLO predictions and of the resulting value of $伪_s(M_Z)$ at the $Z$-boson mass $m_Z$ are studied as a function of the choi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.07251v2-abstract-full').style.display = 'inline'; document.getElementById('1709.07251v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1709.07251v2-abstract-full" style="display: none;"> The strong coupling constant $伪_s(M_Z)$ is determined from inclusive jet and dijet cross sections in neutral-current deep-inelastic $ep$ scattering (DIS) measured at HERA by the H1 collaboration using next-to-next-to-leading order (NNLO) QCD predictions. The dependence of the NNLO predictions and of the resulting value of $伪_s(M_Z)$ at the $Z$-boson mass $m_Z$ are studied as a function of the choice of the renormalisation and factorisation scales. Using inclusive jet and dijet data together, the strong coupling constant is determined to be $伪_s(M_Z)=0.1166\,(19)_{\rm exp}\,(24)_{\rm th}$. Complementary, $伪_s(M_Z)$ is determined together with parton distribution functions of the proton (PDFs) from jet and inclusive DIS data measured by the H1 experiment. The value $伪_s(M_Z)=0.1147\,(25)_{\rm tot}$ obtained is consistent with the determination from jet data alone. The impact of the jet data on the PDFs is studied. The running of the strong coupling is tested at different values of the renormalisation scale and the results are found to be in agreement with expectations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.07251v2-abstract-full').style.display = 'none'; document.getElementById('1709.07251v2-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, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 September, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">45 pages, 17 figures, with changes discussed in an erratum submitted to EPJ C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY17-137 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1709.01151">arXiv:1709.01151</a> <span> [<a href="https://arxiv.org/pdf/1709.01151">pdf</a>, <a href="https://arxiv.org/format/1709.01151">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> </div> </div> <p class="title is-5 mathjax"> xFitter 2.0.0: An Open Source QCD Fit Framework </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Bertone%2C+V">V. Bertone</a>, <a href="/search/hep-ph?searchtype=author&query=Botje%2C+M">M. Botje</a>, <a href="/search/hep-ph?searchtype=author&query=Britzger%2C+D">D. Britzger</a>, <a href="/search/hep-ph?searchtype=author&query=Camarda%2C+S">S. Camarda</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A">A. Cooper-Sarkar</a>, <a href="/search/hep-ph?searchtype=author&query=Giuli%2C+F">F. Giuli</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">A. Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Luszczak%2C+A">A. Luszczak</a>, <a href="/search/hep-ph?searchtype=author&query=Olness%2C+F">F. Olness</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</a>, <a href="/search/hep-ph?searchtype=author&query=Radescu%2C+V">V. Radescu</a>, <a href="/search/hep-ph?searchtype=author&query=S%C5%82omi%C5%84ski%2C+W">W. S艂omi艅ski</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">O. Zenaiev</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="1709.01151v1-abstract-short" style="display: inline;"> xFitter is an open-source package that provides a framework for the determination of the parton distribution functions (PDFs) of the proton for many different kinds of analyses in Quantum Chromodynamics (QCD). xFitter version 2.0.0 has recently been released, and offers an expanded set of tools and options. It incorporates experimental data from a wide range of experiments including fixed-target,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.01151v1-abstract-full').style.display = 'inline'; document.getElementById('1709.01151v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1709.01151v1-abstract-full" style="display: none;"> xFitter is an open-source package that provides a framework for the determination of the parton distribution functions (PDFs) of the proton for many different kinds of analyses in Quantum Chromodynamics (QCD). xFitter version 2.0.0 has recently been released, and offers an expanded set of tools and options. It incorporates experimental data from a wide range of experiments including fixed-target, Tevatron, HERA, and LHC. xFitter can analyze this data up to next-to-next-to-leading-order (NNLO) in perturbation theory with a variety of theoretical calculations including numerous methodological options for carrying out PDF fits and plotting tools which help visualize the results. While primarily based on the collinear factorization foundation, xFitter also provides facilities for fits of dipole models and transverse-momentum dependent (TMD) PDFs. The package can be used to study the impact of new precise measurements from hadron colliders, and also assess the impact of future colliders. This paper provides a brief overview of xFitter with emphasis of the new version 2.0.0 features. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.01151v1-abstract-full').style.display = 'none'; document.getElementById('1709.01151v1-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 September, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">6 pages, 7 figures.Presented at 25th International Workshop on Deep Inelastic Scattering and Related Topics, 3-7 April 2017, Birmingham, UK. PoS(DIS2017)203</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1707.05343">arXiv:1707.05343</a> <span> [<a href="https://arxiv.org/pdf/1707.05343">pdf</a>, <a href="https://arxiv.org/format/1707.05343">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> </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/epjc/s10052-017-5407-3">10.1140/epjc/s10052-017-5407-3 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Impact of the heavy quark matching scales in PDF fits </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=The+xFitter+Developers+Team"> The xFitter Developers Team</a>, <a href="/search/hep-ph?searchtype=author&query=Bertone%2C+V">V. Bertone</a>, <a href="/search/hep-ph?searchtype=author&query=Britzger%2C+D">D. Britzger</a>, <a href="/search/hep-ph?searchtype=author&query=Camarda%2C+S">S. Camarda</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A">A. Cooper-Sarkar</a>, <a href="/search/hep-ph?searchtype=author&query=Geiser%2C+A">A. Geiser</a>, <a href="/search/hep-ph?searchtype=author&query=Giuli%2C+F">F. Giuli</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">A. Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Godat%2C+E">E. Godat</a>, <a href="/search/hep-ph?searchtype=author&query=Kusina%2C+A">A. Kusina</a>, <a href="/search/hep-ph?searchtype=author&query=Luszczak%2C+A">A. Luszczak</a>, <a href="/search/hep-ph?searchtype=author&query=Lyonnet%2C+F">F. Lyonnet</a>, <a href="/search/hep-ph?searchtype=author&query=Olness%2C+F">F. Olness</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</a>, <a href="/search/hep-ph?searchtype=author&query=Radescu%2C+V">V. Radescu</a>, <a href="/search/hep-ph?searchtype=author&query=Schienbein%2C+I">I. Schienbein</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">O. Zenaiev</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="1707.05343v2-abstract-short" style="display: inline;"> We investigate the impact of displaced heavy quark matching scales in a global fit. The heavy quark matching scale $渭_{m}$ determines at which energy scale $渭$ the QCD theory transitions from $N_{F}$ to $N_{F}+1$ in the Variable Flavor Number Scheme (VFNS) for the evolution of the Parton Distribution Functions (PDFs) and strong coupling $伪_S(渭)$. We study the variation of the matching scales, and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.05343v2-abstract-full').style.display = 'inline'; document.getElementById('1707.05343v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1707.05343v2-abstract-full" style="display: none;"> We investigate the impact of displaced heavy quark matching scales in a global fit. The heavy quark matching scale $渭_{m}$ determines at which energy scale $渭$ the QCD theory transitions from $N_{F}$ to $N_{F}+1$ in the Variable Flavor Number Scheme (VFNS) for the evolution of the Parton Distribution Functions (PDFs) and strong coupling $伪_S(渭)$. We study the variation of the matching scales, and their impact on a global PDF fit of the combined HERA data. As the choice of the matching scale $渭_{m}$ effectively is a choice of scheme, this represents a theoretical uncertainty; ideally, we would like to see minimal dependence on this parameter. For the transition across the charm quark (from $N_{F}=3$ to $4$), we find a large $渭_m=渭_{c}$ dependence of the global fit $蠂^2$ at NLO, but this is significantly reduced at NNLO. For the transition across the bottom quark (from $N_{F}=4$ to $5$), we have a reduced $渭_{m}=渭_b$ dependence of the $蠂^2$ at both NLO and NNLO as compared to the charm. This feature is now implemented in xFitter 2.0.0, an open source QCD fit framework. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.05343v2-abstract-full').style.display = 'none'; document.getElementById('1707.05343v2-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 December, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 July, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">18 pages, 12 figures. Updated to match published version</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1705.08863">arXiv:1705.08863</a> <span> [<a href="https://arxiv.org/pdf/1705.08863">pdf</a>, <a href="https://arxiv.org/ps/1705.08863">ps</a>, <a href="https://arxiv.org/format/1705.08863">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> </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.2017.11.002">10.1016/j.physletb.2017.11.002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Running of the Charm-Quark Mass from HERA Deep-Inelastic Scattering Data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Gizhko%2C+A">A. Gizhko</a>, <a href="/search/hep-ph?searchtype=author&query=Geiser%2C+A">A. Geiser</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S">S. Moch</a>, <a href="/search/hep-ph?searchtype=author&query=Abt%2C+I">I. Abt</a>, <a href="/search/hep-ph?searchtype=author&query=Behnke%2C+O">O. Behnke</a>, <a href="/search/hep-ph?searchtype=author&query=Bertolin%2C+A">A. Bertolin</a>, <a href="/search/hep-ph?searchtype=author&query=Bl%C3%BCmlein%2C+J">J. Bl眉mlein</a>, <a href="/search/hep-ph?searchtype=author&query=Britzger%2C+D">D. Britzger</a>, <a href="/search/hep-ph?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/hep-ph?searchtype=author&query=Buniatyan%2C+A">A. Buniatyan</a>, <a href="/search/hep-ph?searchtype=author&query=Bussey%2C+P+J">P. J. Bussey</a>, <a href="/search/hep-ph?searchtype=author&query=Carlin%2C+R">R. Carlin</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A+M">A. M. Cooper-Sarkar</a>, <a href="/search/hep-ph?searchtype=author&query=Daum%2C+K">K. Daum</a>, <a href="/search/hep-ph?searchtype=author&query=Dusini%2C+S">S. Dusini</a>, <a href="/search/hep-ph?searchtype=author&query=Elsen%2C+E">E. Elsen</a>, <a href="/search/hep-ph?searchtype=author&query=Favart%2C+L">L. Favart</a>, <a href="/search/hep-ph?searchtype=author&query=Feltesse%2C+J">J. Feltesse</a>, <a href="/search/hep-ph?searchtype=author&query=Foster%2C+B">B. Foster</a>, <a href="/search/hep-ph?searchtype=author&query=Garfagnini%2C+A">A. Garfagnini</a>, <a href="/search/hep-ph?searchtype=author&query=Garzelli%2C+M">M. Garzelli</a>, <a href="/search/hep-ph?searchtype=author&query=Gayler%2C+J">J. Gayler</a>, <a href="/search/hep-ph?searchtype=author&query=Haidt%2C+D">D. Haidt</a>, <a href="/search/hep-ph?searchtype=author&query=Hladky%2C+J">J. Hladky</a>, <a href="/search/hep-ph?searchtype=author&query=Jung%2C+A+W">A. W. Jung</a> , et al. (25 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="1705.08863v1-abstract-short" style="display: inline;"> Combined HERA data on charm production in deep-inelastic scattering have previously been used to determine the charm-quark running mass $m_c(m_c)$ in the MSbar renormalisation scheme. Here, the same data are used as a function of the photon virtuality $Q^2$ to evaluate the charm-quark running mass at different scales to one-loop order, in the context of a next-to-leading order QCD analysis. The sc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1705.08863v1-abstract-full').style.display = 'inline'; document.getElementById('1705.08863v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1705.08863v1-abstract-full" style="display: none;"> Combined HERA data on charm production in deep-inelastic scattering have previously been used to determine the charm-quark running mass $m_c(m_c)$ in the MSbar renormalisation scheme. Here, the same data are used as a function of the photon virtuality $Q^2$ to evaluate the charm-quark running mass at different scales to one-loop order, in the context of a next-to-leading order QCD analysis. The scale dependence of the mass is found to be consistent with QCD expectations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1705.08863v1-abstract-full').style.display = 'none'; document.getElementById('1705.08863v1-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 May, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">12 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY-17-048 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1701.08553">arXiv:1701.08553</a> <span> [<a href="https://arxiv.org/pdf/1701.08553">pdf</a>, <a href="https://arxiv.org/format/1701.08553">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> </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/epjc/s10052-017-4931-5">10.1140/epjc/s10052-017-4931-5 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The photon PDF from high-mass Drell Yan data at the LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Giuli%2C+F">F. Giuli</a>, <a href="/search/hep-ph?searchtype=author&query=team%2C+x+D">xFitter Developers' team</a>, <a href="/search/hep-ph?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ph?searchtype=author&query=Bertone%2C+V">V. Bertone</a>, <a href="/search/hep-ph?searchtype=author&query=Britzger%2C+D">D. Britzger</a>, <a href="/search/hep-ph?searchtype=author&query=Carrazza%2C+S">S. Carrazza</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A">A. Cooper-Sarkar</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">A. Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Lohwasser%2C+K">K. Lohwasser</a>, <a href="/search/hep-ph?searchtype=author&query=Luszczak%2C+A">A. Luszczak</a>, <a href="/search/hep-ph?searchtype=author&query=Olness%2C+F">F. Olness</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</a>, <a href="/search/hep-ph?searchtype=author&query=Radescu%2C+V">V. Radescu</a>, <a href="/search/hep-ph?searchtype=author&query=Rojo%2C+J">J. Rojo</a>, <a href="/search/hep-ph?searchtype=author&query=Sadykov%2C+R">R. Sadykov</a>, <a href="/search/hep-ph?searchtype=author&query=Shvydkin%2C+P">P. Shvydkin</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">O. Zenaiev</a>, <a href="/search/hep-ph?searchtype=author&query=Lisovyi%2C+M">M. Lisovyi</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="1701.08553v1-abstract-short" style="display: inline;"> Achieving the highest precision for theoretical predictions at the LHC requires the calculation of hard-scattering cross-sections that include perturbative QCD corrections up to (N)NNLO and electroweak (EW) corrections up to NLO. Parton distribution functions (PDFs) need to be provided with matching accuracy, which in the case of QED effects involves introducing the photon parton distribution of t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.08553v1-abstract-full').style.display = 'inline'; document.getElementById('1701.08553v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1701.08553v1-abstract-full" style="display: none;"> Achieving the highest precision for theoretical predictions at the LHC requires the calculation of hard-scattering cross-sections that include perturbative QCD corrections up to (N)NNLO and electroweak (EW) corrections up to NLO. Parton distribution functions (PDFs) need to be provided with matching accuracy, which in the case of QED effects involves introducing the photon parton distribution of the proton, $x纬(x,Q^2)$. In this work a determination of the photon PDF from fits to recent ATLAS measurements of high-mass Drell-Yan dilepton production at $\sqrt{s}=8$ TeV is presented. This analysis is based on the xFitter framework, and has required improvements both in the APFEL program, to account for NLO QED effects, and in the aMCfast interface to account for the photon-initiated contributions in the EW calculations within MadGraph5_aMC@NLO. The results are compared with other recent QED fits and determinations of the photon PDF, consistent results are found. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.08553v1-abstract-full').style.display = 'none'; document.getElementById('1701.08553v1-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> 30 January, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">20 pages, 13 figures, to be submitted to JHEP</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1701.05838">arXiv:1701.05838</a> <span> [<a href="https://arxiv.org/pdf/1701.05838">pdf</a>, <a href="https://arxiv.org/format/1701.05838">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> </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.96.014011">10.1103/PhysRevD.96.014011 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Parton Distribution Functions, $伪_s$ and Heavy-Quark Masses for LHC Run II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Alekhin%2C+S">S. Alekhin</a>, <a href="/search/hep-ph?searchtype=author&query=Bl%C3%BCmlein%2C+J">J. Bl眉mlein</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S">S. Moch</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</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="1701.05838v1-abstract-short" style="display: inline;"> We determine a new set of parton distribution functions (ABMP16), the strong coupling constant $伪_s$ and the quark masses $m_c$, $m_b$ and $m_t$ in a global fit to next-to-next-to-leading order (NNLO) in QCD. The analysis uses the $\overline{\mathrm{MS}}$ scheme for $伪_s$ and all quark masses and is performed in the fixed-flavor number scheme for $n_f=3, 4, 5$. Essential new elements of the fit ar… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.05838v1-abstract-full').style.display = 'inline'; document.getElementById('1701.05838v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1701.05838v1-abstract-full" style="display: none;"> We determine a new set of parton distribution functions (ABMP16), the strong coupling constant $伪_s$ and the quark masses $m_c$, $m_b$ and $m_t$ in a global fit to next-to-next-to-leading order (NNLO) in QCD. The analysis uses the $\overline{\mathrm{MS}}$ scheme for $伪_s$ and all quark masses and is performed in the fixed-flavor number scheme for $n_f=3, 4, 5$. Essential new elements of the fit are the combined data from HERA for inclusive deep-inelastic scattering (DIS), data from the fixed-target experiments NOMAD and CHORUS for neutrino-induced DIS, and data from Tevatron and the LHC for the Drell-Yan process and the hadro-production of single-top and top-quark pairs. The theory predictions include new improved approximations at NNLO for the production of heavy quarks in DIS and for the hadro-production of single-top quarks. The description of higher twist effects relevant beyond the leading twist collinear factorization approximation is refined. At NNLO we obtain the value $伪_s^{(n_f=5)}(M_Z) = 0.1147 \pm 0.0008$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.05838v1-abstract-full').style.display = 'none'; document.getElementById('1701.05838v1-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> 20 January, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">70 pages pdflatex, 34 figures, 15 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 16-179, DO-TH 16/13 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 96, 014011 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1611.03815">arXiv:1611.03815</a> <span> [<a href="https://arxiv.org/pdf/1611.03815">pdf</a>, <a href="https://arxiv.org/format/1611.03815">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> </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/10.1007/JHEP05(2017)004">10.1007/JHEP05(2017)004 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Prompt neutrino fluxes in the atmosphere with PROSA parton distribution functions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=PROSA+Collaboration"> PROSA Collaboration</a>, <a href="/search/hep-ph?searchtype=author&query=Garzelli%2C+M+V">M. V. Garzelli</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S">S. Moch</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">O. Zenaiev</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A">A. Cooper-Sarkar</a>, <a href="/search/hep-ph?searchtype=author&query=Geiser%2C+A">A. Geiser</a>, <a href="/search/hep-ph?searchtype=author&query=Lipka%2C+K">K. Lipka</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</a>, <a href="/search/hep-ph?searchtype=author&query=Sigl%2C+G">G. Sigl</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="1611.03815v1-abstract-short" style="display: inline;"> Effects on atmospheric prompt neutrino fluxes of present uncertainties affecting the nucleon composition are studied by using the PROSA fit to parton distribution functions (PDFs). The PROSA fit extends the precision of the PDFs to low x, which is the kinematic region of relevance for high-energy neutrino production, by taking into account LHCb data on charm and bottom hadroproduction. In the rang… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1611.03815v1-abstract-full').style.display = 'inline'; document.getElementById('1611.03815v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1611.03815v1-abstract-full" style="display: none;"> Effects on atmospheric prompt neutrino fluxes of present uncertainties affecting the nucleon composition are studied by using the PROSA fit to parton distribution functions (PDFs). The PROSA fit extends the precision of the PDFs to low x, which is the kinematic region of relevance for high-energy neutrino production, by taking into account LHCb data on charm and bottom hadroproduction. In the range of neutrino energies explored by present Very Large Volume Neutrino Telescopes, it is found that PDF uncertainties are far smaller with respect to those due to renormalization and factorization scale variation and to assumptions on the cosmic ray composition, which at present dominate and limit our knowledge of prompt neutrino fluxes. A discussion is presented on how these uncertainties affect the expected number of atmospheric prompt neutrino events in the analysis of high-energy events characterized by interaction vertices fully contained within the instrumented volume of the detector, performed by the IceCube collaboration. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1611.03815v1-abstract-full').style.display = 'none'; document.getElementById('1611.03815v1-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 November, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">36 pages, 17 figures, 1 table</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 16-152 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1609.07417">arXiv:1609.07417</a> <span> [<a href="https://arxiv.org/pdf/1609.07417">pdf</a>, <a href="https://arxiv.org/format/1609.07417">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> </div> </div> <p class="title is-5 mathjax"> PDFs, $伪_s$, and quark masses from global fits </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Alekhin%2C+S">S. Alekhin</a>, <a href="/search/hep-ph?searchtype=author&query=Bluemlein%2C+J">J. Bluemlein</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S">S. Moch</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</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="1609.07417v2-abstract-short" style="display: inline;"> The strong coupling constant $伪_s$ and the heavy-quark masses, $m_c$, $m_b$, $m_t$ are extracted simultaneosly with the parton distribution functions (PDFs) in the updated ABM12 fit including recent data from CERN-SPS, HERA, Tevatron, and the LHC. The values of \begin{eqnarray} \nonumber 伪_s(M_Z)&=&0.1147\pm0.0008~({\rm exp.)},\\ \nonumber m_c(m_c)&=&1.252\pm 0.018~({\rm exp.})~{\rm GeV},\\ \nonum… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.07417v2-abstract-full').style.display = 'inline'; document.getElementById('1609.07417v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1609.07417v2-abstract-full" style="display: none;"> The strong coupling constant $伪_s$ and the heavy-quark masses, $m_c$, $m_b$, $m_t$ are extracted simultaneosly with the parton distribution functions (PDFs) in the updated ABM12 fit including recent data from CERN-SPS, HERA, Tevatron, and the LHC. The values of \begin{eqnarray} \nonumber 伪_s(M_Z)&=&0.1147\pm0.0008~({\rm exp.)},\\ \nonumber m_c(m_c)&=&1.252\pm 0.018~({\rm exp.})~{\rm GeV},\\ \nonumber m_b(m_b)&=&3.83\pm0.12~({\rm exp.})~{\rm GeV},\\ \nonumber m_t(m_t)&=&160.9\pm1.1~({\rm exp.})~{\rm GeV} \end{eqnarray} are obtained with the $\overline{MS}$ heavy-quark mass definition being employed throughout the analysis. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.07417v2-abstract-full').style.display = 'none'; document.getElementById('1609.07417v2-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 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 September, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">7 pages, 4 figures; preprint number corrected</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 16-185, DO-TH 16/26 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1609.07037">arXiv:1609.07037</a> <span> [<a href="https://arxiv.org/pdf/1609.07037">pdf</a>, <a href="https://arxiv.org/format/1609.07037">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> </div> </div> <p class="title is-5 mathjax"> Recommendations for PDF usage in LHC predictions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">Ringaile Placakyte</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="1609.07037v1-abstract-short" style="display: inline;"> A short review of the currently available modern parton distribution functions (PDFs)and the theory predictions obtained using those PDFs for several benchmark processes at LHC, including Higgs boson production, is presented in this write-up. It includes the discussion on theory assumptions made in the determination procedure of PDFs and an impact on the differences in the obtained predictions, fo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.07037v1-abstract-full').style.display = 'inline'; document.getElementById('1609.07037v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1609.07037v1-abstract-full" style="display: none;"> A short review of the currently available modern parton distribution functions (PDFs)and the theory predictions obtained using those PDFs for several benchmark processes at LHC, including Higgs boson production, is presented in this write-up. It includes the discussion on theory assumptions made in the determination procedure of PDFs and an impact on the differences in the obtained predictions, followed by the alternative to PDF4LHC recommendations for the usage of PDF sets for theory predictions at the LHC. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.07037v1-abstract-full').style.display = 'none'; document.getElementById('1609.07037v1-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> 22 September, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">7 pages, 2 figures, accepted for publication in XXIV International Workshop on Deep-Inelastic Scattering and Related Subjects (11-15 April, 2016, DESY Hamburg, Germany) proceedings</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1609.03327">arXiv:1609.03327</a> <span> [<a href="https://arxiv.org/pdf/1609.03327">pdf</a>, <a href="https://arxiv.org/format/1609.03327">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> </div> </div> <p class="title is-5 mathjax"> The new ABMP16 PDF </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Alekhin%2C+S">S. Alekhin</a>, <a href="/search/hep-ph?searchtype=author&query=Bluemlein%2C+J">J. Bluemlein</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S">S. Moch</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</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="1609.03327v1-abstract-short" style="display: inline;"> We present an update of the ABM12 PDF analysis including improved constraints due to the final version of the inclusive DIS HERA data, the Tevatron and LHC data on the W- and Z-production and those on heavy-quark production in the electron- and neutrino-induced DIS at HERA and the fixed-target experiments NOMAD and CHORUS. We also check the impact of the Tevatron and LHC top-quark production data… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.03327v1-abstract-full').style.display = 'inline'; document.getElementById('1609.03327v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1609.03327v1-abstract-full" style="display: none;"> We present an update of the ABM12 PDF analysis including improved constraints due to the final version of the inclusive DIS HERA data, the Tevatron and LHC data on the W- and Z-production and those on heavy-quark production in the electron- and neutrino-induced DIS at HERA and the fixed-target experiments NOMAD and CHORUS. We also check the impact of the Tevatron and LHC top-quark production data on the PDFs and the strong coupling constant. We obtain $伪_s(M_Z)=0.1145(9)$ and $0.1147(8)$ with and without the top-quark data included, respectively. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.03327v1-abstract-full').style.display = 'none'; document.getElementById('1609.03327v1-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 September, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">6 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 16-121, DO-TH 16/25 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1605.01946">arXiv:1605.01946</a> <span> [<a href="https://arxiv.org/pdf/1605.01946">pdf</a>, <a href="https://arxiv.org/format/1605.01946">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> </div> </div> <p class="title is-5 mathjax"> A determination of mc(mc) from HERA data using a matched heavy-flavor scheme </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=team%2C+x+D">xFitter Developers' team</a>, <a href="/search/hep-ph?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ph?searchtype=author&query=Bertone%2C+V">Valerio Bertone</a>, <a href="/search/hep-ph?searchtype=author&query=Camarda%2C+S">Stefano Camarda</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A">Amanda Cooper-Sarkar</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">Alexandre Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Luszczak%2C+A">Agnieszka Luszczak</a>, <a href="/search/hep-ph?searchtype=author&query=Pirumov%2C+H">Hayk Pirumov</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">Ringaile Placakyte</a>, <a href="/search/hep-ph?searchtype=author&query=Rabbertz%2C+K">Klaus Rabbertz</a>, <a href="/search/hep-ph?searchtype=author&query=Radescu%2C+V">Voica Radescu</a>, <a href="/search/hep-ph?searchtype=author&query=Rojo%2C+J">Juan Rojo</a>, <a href="/search/hep-ph?searchtype=author&query=Sapranov%2C+A">Andrey Sapranov</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">Oleksandr Zenaiev</a>, <a href="/search/hep-ph?searchtype=author&query=Geiser%2C+A">Achim Geiser</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="1605.01946v1-abstract-short" style="display: inline;"> The charm quark mass is one of the fundamental parameters of the Standard Model Lagrangian. In this work we present a determination of the MSbar charm mass from a fit to the inclusive and charm HERA deep-inelastic structure function data. The analysis is performed within the xFitter framework, with structure functions computed in the FONLL general-mass scheme as implemented in APFEL. In the case o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.01946v1-abstract-full').style.display = 'inline'; document.getElementById('1605.01946v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1605.01946v1-abstract-full" style="display: none;"> The charm quark mass is one of the fundamental parameters of the Standard Model Lagrangian. In this work we present a determination of the MSbar charm mass from a fit to the inclusive and charm HERA deep-inelastic structure function data. The analysis is performed within the xFitter framework, with structure functions computed in the FONLL general-mass scheme as implemented in APFEL. In the case of the FONLL-C scheme, we obtain mc(mc) = 1.335 +- 0.043(exp) +0.019 -0.000(param) +0.011 -0.008(mod) +0.033 -0.008(th) GeV. We also perform an analogous determination in the fixed-flavor-number scheme at next-to-leading order, finding mc(mc) = 1.318 +- 0.054(exp) +0.011 -0.010(param) +0.015 -0.019(mod) +0.045 -0.004(th) GeV, compatible with the FONLL-C value. Our results are consistent with previous determinations from DIS data as well as with the PDG world average. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.01946v1-abstract-full').style.display = 'none'; document.getElementById('1605.01946v1-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 May, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">37 pages, 12 figures, 3 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> OUTP-16-10P, DESY Report-16-078 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1603.09619">arXiv:1603.09619</a> <span> [<a href="https://arxiv.org/pdf/1603.09619">pdf</a>, <a href="https://arxiv.org/format/1603.09619">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> </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.94.034035">10.1103/PhysRevD.94.034035 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A QCD analysis of CMS inclusive differential Z production data at sqrt(s) = 8 TeV </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Chatterjee%2C+R+M">Rajdeep M Chatterjee</a>, <a href="/search/hep-ph?searchtype=author&query=Guchait%2C+M">Monoranjan Guchait</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">Ringaile Placakyte</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="1603.09619v1-abstract-short" style="display: inline;"> The parton distribution functions (PDFs) of the proton are one of the essential ingredients to describe physics processes at hadron colliders. The Z boson production data at the LHC have a potential to constrain PDFs, especially the gluon distribution. In this study the CMS measurement of the inclusive double differential Z boson production cross section in terms of transverse momentum and rapidit… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.09619v1-abstract-full').style.display = 'inline'; document.getElementById('1603.09619v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1603.09619v1-abstract-full" style="display: none;"> The parton distribution functions (PDFs) of the proton are one of the essential ingredients to describe physics processes at hadron colliders. The Z boson production data at the LHC have a potential to constrain PDFs, especially the gluon distribution. In this study the CMS measurement of the inclusive double differential Z boson production cross section in terms of transverse momentum and rapidity are compared to the next-to-leading order theory predictions at the center-of-mass energy of sqrt(s)=8 TeV with an integrated luminosity of 19.71 inverse femtobarns. In addition, the sensitivity of this measurement to PDFs is studied within the framework of the HERAFitter. A moderate improvement to the gluon distribution is observed at the Bjorken x ~ 0.1 region. However, in order to obtain further improvement to the gluon distribution in the global fits, the higher-order theory calculations accessible via fast techniques are necessary. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.09619v1-abstract-full').style.display = 'none'; document.getElementById('1603.09619v1-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 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">9 pages, 5 figures</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, 034035 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1603.08906">arXiv:1603.08906</a> <span> [<a href="https://arxiv.org/pdf/1603.08906">pdf</a>, <a href="https://arxiv.org/format/1603.08906">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> </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/epjc/s10052-016-4285-4">10.1140/epjc/s10052-016-4285-4 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Critical Appraisal and Evaluation of Modern PDFs </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Accardi%2C+A">A. Accardi</a>, <a href="/search/hep-ph?searchtype=author&query=Alekhin%2C+S">S. Alekhin</a>, <a href="/search/hep-ph?searchtype=author&query=Bl%C3%BCmlein%2C+J">J. Bl眉mlein</a>, <a href="/search/hep-ph?searchtype=author&query=Garzelli%2C+M+V">M. V. Garzelli</a>, <a href="/search/hep-ph?searchtype=author&query=Lipka%2C+K">K. Lipka</a>, <a href="/search/hep-ph?searchtype=author&query=Melnitchouk%2C+W">W. Melnitchouk</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S">S. Moch</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</a>, <a href="/search/hep-ph?searchtype=author&query=Owens%2C+J+F">J. F. Owens</a>, <a href="/search/hep-ph?searchtype=author&query=Reya%2C+E">E. Reya</a>, <a href="/search/hep-ph?searchtype=author&query=Sato%2C+N">N. Sato</a>, <a href="/search/hep-ph?searchtype=author&query=Vogt%2C+A">A. Vogt</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">O. Zenaiev</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="1603.08906v2-abstract-short" style="display: inline;"> We review the present status of the determination of parton distribution functions (PDFs) in the light of the precision requirements for the LHC in Run 2 and other future hadron colliders. We provide brief reviews of all currently available PDF sets and use them to compute cross sections for a number of benchmark processes, including Higgs boson production in gluon-gluon fusion at the LHC. We show… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.08906v2-abstract-full').style.display = 'inline'; document.getElementById('1603.08906v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1603.08906v2-abstract-full" style="display: none;"> We review the present status of the determination of parton distribution functions (PDFs) in the light of the precision requirements for the LHC in Run 2 and other future hadron colliders. We provide brief reviews of all currently available PDF sets and use them to compute cross sections for a number of benchmark processes, including Higgs boson production in gluon-gluon fusion at the LHC. We show that the differences in the predictions obtained with the various PDFs are due to particular theory assumptions made in the fits of those PDFs. We discuss PDF uncertainties in the kinematic region covered by the LHC and on averaging procedures for PDFs, such as advocated by the PDF4LHC15 sets, and provide recommendations for the usage of PDF sets for theory predictions at the LHC. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.08906v2-abstract-full').style.display = 'none'; document.getElementById('1603.08906v2-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> 8 August, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 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">70 pages pdflatex, 19 figures, 17 tables; final version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 16-041, DO-TH 16/05, JLAB-THY-16-2231, LTH 1081 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1508.07923">arXiv:1508.07923</a> <span> [<a href="https://arxiv.org/pdf/1508.07923">pdf</a>, <a href="https://arxiv.org/ps/1508.07923">ps</a>, <a href="https://arxiv.org/format/1508.07923">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> </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.94.114038">10.1103/PhysRevD.94.114038 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Iso-spin asymmetry of quark distributions and implications for single top-quark production at the LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Alekhin%2C+S">S. Alekhin</a>, <a href="/search/hep-ph?searchtype=author&query=Bluemlein%2C+J">J. Bluemlein</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S">S. Moch</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</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="1508.07923v1-abstract-short" style="display: inline;"> We present an improved determination of the up- and down-quark distributions in the proton using recent data on charged lepton asymmetries from $W^\pm$ gauge-boson production at the LHC and Tevatron. The analysis is performed in the framework of a global fit of parton distribution functions. The fit results are consistent with a non-zero iso-spin asymmetry of the sea, $x(\bar d - \bar u)$, at smal… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.07923v1-abstract-full').style.display = 'inline'; document.getElementById('1508.07923v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1508.07923v1-abstract-full" style="display: none;"> We present an improved determination of the up- and down-quark distributions in the proton using recent data on charged lepton asymmetries from $W^\pm$ gauge-boson production at the LHC and Tevatron. The analysis is performed in the framework of a global fit of parton distribution functions. The fit results are consistent with a non-zero iso-spin asymmetry of the sea, $x(\bar d - \bar u)$, at small values of Bjorken $x\sim 10^{-4}$ indicating a delayed onset of the Regge asymptotics of a vanishing $(\bar d - \bar u)$-asymmetry at small-$x$. We compare with up- and down-quark distributions available in the literature and provide accurate predictions for the production of single top-quarks at the LHC, a process which can serve as a standard candle for the light quark flavor content of the proton. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1508.07923v1-abstract-full').style.display = 'none'; document.getElementById('1508.07923v1-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 August, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">21 pages, 13 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 15-161 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 94, 114038 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1507.05267">arXiv:1507.05267</a> <span> [<a href="https://arxiv.org/pdf/1507.05267">pdf</a>, <a href="https://arxiv.org/format/1507.05267">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> </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/10.5506/APhysPolB.46.2501">10.5506/APhysPolB.46.2501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transverse momentum dependent (TMD) parton distribution functions: status and prospects </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Angeles-Martinez%2C+R">R. Angeles-Martinez</a>, <a href="/search/hep-ph?searchtype=author&query=Bacchetta%2C+A">A. Bacchetta</a>, <a href="/search/hep-ph?searchtype=author&query=Balitsky%2C+I+I">I. I. Balitsky</a>, <a href="/search/hep-ph?searchtype=author&query=Boer%2C+D">D. Boer</a>, <a href="/search/hep-ph?searchtype=author&query=Boglione%2C+M">M. Boglione</a>, <a href="/search/hep-ph?searchtype=author&query=Boussarie%2C+R">R. Boussarie</a>, <a href="/search/hep-ph?searchtype=author&query=Ceccopieri%2C+F+A">F. A. Ceccopieri</a>, <a href="/search/hep-ph?searchtype=author&query=Cherednikov%2C+I+O">I. O. Cherednikov</a>, <a href="/search/hep-ph?searchtype=author&query=Connor%2C+P">P. Connor</a>, <a href="/search/hep-ph?searchtype=author&query=Echevarria%2C+M+G">M. G. Echevarria</a>, <a href="/search/hep-ph?searchtype=author&query=Ferrera%2C+G">G. Ferrera</a>, <a href="/search/hep-ph?searchtype=author&query=Luyando%2C+J+G">J. Grados Luyando</a>, <a href="/search/hep-ph?searchtype=author&query=Hautmann%2C+F">F. Hautmann</a>, <a href="/search/hep-ph?searchtype=author&query=Jung%2C+H">H. Jung</a>, <a href="/search/hep-ph?searchtype=author&query=Kasemets%2C+T">T. Kasemets</a>, <a href="/search/hep-ph?searchtype=author&query=Kutak%2C+K">K. Kutak</a>, <a href="/search/hep-ph?searchtype=author&query=Lansberg%2C+J+P">J. P. Lansberg</a>, <a href="/search/hep-ph?searchtype=author&query=Lelek%2C+A">A. Lelek</a>, <a href="/search/hep-ph?searchtype=author&query=Lykasov%2C+G">G. Lykasov</a>, <a href="/search/hep-ph?searchtype=author&query=Martinez%2C+J+D+M">J. D. Madrigal Martinez</a>, <a href="/search/hep-ph?searchtype=author&query=Mulders%2C+P+J">P. J. Mulders</a>, <a href="/search/hep-ph?searchtype=author&query=Nocera%2C+E+R">E. R. Nocera</a>, <a href="/search/hep-ph?searchtype=author&query=Petreska%2C+E">E. Petreska</a>, <a href="/search/hep-ph?searchtype=author&query=Pisano%2C+C">C. Pisano</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</a> , et al. (12 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="1507.05267v1-abstract-short" style="display: inline;"> We provide a concise overview on transverse momentum dependent (TMD) parton distribution functions, their application to topical issues in high-energy physics phenomenology, and their theoretical connections with QCD resummation, evolution and factorization theorems. We illustrate the use of TMDs via examples of multi-scale problems in hadronic collisions. These include transverse momentum q_T spe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1507.05267v1-abstract-full').style.display = 'inline'; document.getElementById('1507.05267v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1507.05267v1-abstract-full" style="display: none;"> We provide a concise overview on transverse momentum dependent (TMD) parton distribution functions, their application to topical issues in high-energy physics phenomenology, and their theoretical connections with QCD resummation, evolution and factorization theorems. We illustrate the use of TMDs via examples of multi-scale problems in hadronic collisions. These include transverse momentum q_T spectra of Higgs and vector bosons for low q_T, and azimuthal correlations in the production of multiple jets associated with heavy bosons at large jet masses. We discuss computational tools for TMDs, and present an application of a new tool, TMDlib, to parton density fits and parameterizations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1507.05267v1-abstract-full').style.display = 'none'; document.getElementById('1507.05267v1-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> 19 July, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">20 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 15-111, NIKHEF 2015-023, RAL-P-2015-006 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1507.00556">arXiv:1507.00556</a> <span> [<a href="https://arxiv.org/pdf/1507.00556">pdf</a>, <a href="https://arxiv.org/format/1507.00556">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> </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/10.1088/0954-3899/42/10/103103">10.1088/0954-3899/42/10/103103 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The PDF4LHC report on PDFs and LHC data: Results from Run I and preparation for Run II </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Rojo%2C+J">Juan Rojo</a>, <a href="/search/hep-ph?searchtype=author&query=Accardi%2C+A">Alberto Accardi</a>, <a href="/search/hep-ph?searchtype=author&query=Ball%2C+R+D">Richard D. Ball</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A">Amanda Cooper-Sarkar</a>, <a href="/search/hep-ph?searchtype=author&query=de+Roeck%2C+A">Albert de Roeck</a>, <a href="/search/hep-ph?searchtype=author&query=Farry%2C+S">Stephen Farry</a>, <a href="/search/hep-ph?searchtype=author&query=Ferrando%2C+J">James Ferrando</a>, <a href="/search/hep-ph?searchtype=author&query=Forte%2C+S">Stefano Forte</a>, <a href="/search/hep-ph?searchtype=author&query=Gao%2C+J">Jun Gao</a>, <a href="/search/hep-ph?searchtype=author&query=Harland-Lang%2C+L">Lucian Harland-Lang</a>, <a href="/search/hep-ph?searchtype=author&query=Huston%2C+J">Joey Huston</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">Alexander Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Gouzevitch%2C+M">Maxime Gouzevitch</a>, <a href="/search/hep-ph?searchtype=author&query=Gwenlan%2C+C">Claire Gwenlan</a>, <a href="/search/hep-ph?searchtype=author&query=Lipka%2C+K">Katerina Lipka</a>, <a href="/search/hep-ph?searchtype=author&query=Lisovyi%2C+M">Mykhailo Lisovyi</a>, <a href="/search/hep-ph?searchtype=author&query=Mangano%2C+M">Michelangelo Mangano</a>, <a href="/search/hep-ph?searchtype=author&query=Nadolsky%2C+P">Pavel Nadolsky</a>, <a href="/search/hep-ph?searchtype=author&query=Perrozzi%2C+L">Luca Perrozzi</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">Ringaile Placakyte</a>, <a href="/search/hep-ph?searchtype=author&query=Radescu%2C+V">Voica Radescu</a>, <a href="/search/hep-ph?searchtype=author&query=Salam%2C+G+P">Gavin P. Salam</a>, <a href="/search/hep-ph?searchtype=author&query=Thorne%2C+R">Robert Thorne</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="1507.00556v1-abstract-short" style="display: inline;"> The accurate determination of the Parton Distribution Functions (PDFs) of the proton is an essential ingredient of the Large Hadron Collider (LHC) program. PDF uncertainties impact a wide range of processes, from Higgs boson characterisation and precision Standard Model measurements to New Physics searches. A major recent development in modern PDF analyses has been to exploit the wealth of new inf… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1507.00556v1-abstract-full').style.display = 'inline'; document.getElementById('1507.00556v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1507.00556v1-abstract-full" style="display: none;"> The accurate determination of the Parton Distribution Functions (PDFs) of the proton is an essential ingredient of the Large Hadron Collider (LHC) program. PDF uncertainties impact a wide range of processes, from Higgs boson characterisation and precision Standard Model measurements to New Physics searches. A major recent development in modern PDF analyses has been to exploit the wealth of new information contained in precision measurements from the LHC Run I, as well as progress in tools and methods to include these data in PDF fits. In this report we summarise the information that PDF-sensitive measurements at the LHC have provided so far, and review the prospects for further constraining PDFs with data from the recently started Run II. This document aims to provide useful input to the LHC collaborations to prioritise their PDF-sensitive measurements at Run II, as well as a comprehensive reference for the PDF-fitting collaborations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1507.00556v1-abstract-full').style.display = 'none'; document.getElementById('1507.00556v1-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 July, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">55 pages, 13 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> OUTP-15-11P, LCTS/2015-14, GLAS-PPE/2015-01, DESY 15-088, JLAB-THY-15-2064, CERN-PH-TH-2015-150 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1503.05221">arXiv:1503.05221</a> <span> [<a href="https://arxiv.org/pdf/1503.05221">pdf</a>, <a href="https://arxiv.org/ps/1503.05221">ps</a>, <a href="https://arxiv.org/format/1503.05221">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> </div> </div> <p class="title is-5 mathjax"> QCD analysis of $W$- and $Z$-boson production at Tevatron </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Camarda%2C+S">S. Camarda</a>, <a href="/search/hep-ph?searchtype=author&query=Belov%2C+P">P. Belov</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A+M">A. M. Cooper-Sarkar</a>, <a href="/search/hep-ph?searchtype=author&query=Diaconu%2C+C">C. Diaconu</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">A. Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Guffanti%2C+A">A. Guffanti</a>, <a href="/search/hep-ph?searchtype=author&query=Jung%2C+A">A. Jung</a>, <a href="/search/hep-ph?searchtype=author&query=Kolesnikov%2C+V">V. Kolesnikov</a>, <a href="/search/hep-ph?searchtype=author&query=Lohwasser%2C+K">K. Lohwasser</a>, <a href="/search/hep-ph?searchtype=author&query=Myronenko%2C+V">V. Myronenko</a>, <a href="/search/hep-ph?searchtype=author&query=Olness%2C+F">F. Olness</a>, <a href="/search/hep-ph?searchtype=author&query=Pirumov%2C+H">H. Pirumov</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</a>, <a href="/search/hep-ph?searchtype=author&query=Radescu%2C+V">V. Radescu</a>, <a href="/search/hep-ph?searchtype=author&query=Sapronov%2C+A">A. Sapronov</a>, <a href="/search/hep-ph?searchtype=author&query=Slominski%2C+W">W. Slominski</a>, <a href="/search/hep-ph?searchtype=author&query=Starovoitov%2C+P">P. Starovoitov</a>, <a href="/search/hep-ph?searchtype=author&query=Sutton%2C+M">M. Sutton</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="1503.05221v2-abstract-short" style="display: inline;"> Recent measurements of the $W$-boson charge asymmetry and of the $Z$-boson production cross sections, performed at the Tevatron collider in Run II by the D0 and CDF collaborations, are studied using the HERAFitter framework to assess their impact on the proton parton distribution functions (PDFs). The Tevatron measurements, together with deep-inelastic scattering data from HERA, are included in a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.05221v2-abstract-full').style.display = 'inline'; document.getElementById('1503.05221v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1503.05221v2-abstract-full" style="display: none;"> Recent measurements of the $W$-boson charge asymmetry and of the $Z$-boson production cross sections, performed at the Tevatron collider in Run II by the D0 and CDF collaborations, are studied using the HERAFitter framework to assess their impact on the proton parton distribution functions (PDFs). The Tevatron measurements, together with deep-inelastic scattering data from HERA, are included in a QCD analysis performed at next-to-leading order, and compared to the predictions obtained using other PDF sets from different groups. Good agreement between measurements and theoretical predictions is observed. The Tevatron data provide significant constraints on the $d$-valence quark distribution. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.05221v2-abstract-full').style.display = 'none'; document.getElementById('1503.05221v2-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 May, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">18 pages, 5 tables, 8 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY Report 15-035 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1503.04581">arXiv:1503.04581</a> <span> [<a href="https://arxiv.org/pdf/1503.04581">pdf</a>, <a href="https://arxiv.org/ps/1503.04581">ps</a>, <a href="https://arxiv.org/format/1503.04581">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> </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/epjc/s10052-015-3618-z">10.1140/epjc/s10052-015-3618-z <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Impact of heavy-flavour production cross sections measured by the LHCb experiment on parton distribution functions at low x </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">Oleksandr Zenaiev</a>, <a href="/search/hep-ph?searchtype=author&query=Geiser%2C+A">Achim Geiser</a>, <a href="/search/hep-ph?searchtype=author&query=Lipka%2C+K">Katerina Lipka</a>, <a href="/search/hep-ph?searchtype=author&query=Bl%C3%BCmlein%2C+J">Johannes Bl眉mlein</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A">Amanda Cooper-Sarkar</a>, <a href="/search/hep-ph?searchtype=author&query=Garzelli%2C+M">Maria-Vittoria Garzelli</a>, <a href="/search/hep-ph?searchtype=author&query=Guzzi%2C+M">Marco Guzzi</a>, <a href="/search/hep-ph?searchtype=author&query=Kuprash%2C+O">Oleg Kuprash</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S">Sven-Olaf Moch</a>, <a href="/search/hep-ph?searchtype=author&query=Nadolsky%2C+P">Pavel Nadolsky</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">Ringaile Placakyte</a>, <a href="/search/hep-ph?searchtype=author&query=Rabbertz%2C+K">Klaus Rabbertz</a>, <a href="/search/hep-ph?searchtype=author&query=Schienbein%2C+I">Ingo Schienbein</a>, <a href="/search/hep-ph?searchtype=author&query=Starovoitov%2C+P">Pavel Starovoitov</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="1503.04581v1-abstract-short" style="display: inline;"> The impact of recent measurements of heavy-flavour production in deep inelastic $ep$ scattering and in $pp$ collisions on parton distribution functions is studied in a QCD analysis in the fixed-flavour number scheme at next-to-leading order. Differential cross sections of charm- and beauty-hadron production measured by LHCb are used together with inclusive and heavy-flavour production cross sectio… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.04581v1-abstract-full').style.display = 'inline'; document.getElementById('1503.04581v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1503.04581v1-abstract-full" style="display: none;"> The impact of recent measurements of heavy-flavour production in deep inelastic $ep$ scattering and in $pp$ collisions on parton distribution functions is studied in a QCD analysis in the fixed-flavour number scheme at next-to-leading order. Differential cross sections of charm- and beauty-hadron production measured by LHCb are used together with inclusive and heavy-flavour production cross sections in deep inelastic scattering at HERA. The heavy-flavour data of the LHCb experiment impose additional constraints on the gluon and the sea-quark distributions at low partonic fractions $x$ of the proton momentum, down to $x \sim 5 \times 10^{-6}$. This kinematic range is currently not covered by other experimental data in perturbative QCD fits. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.04581v1-abstract-full').style.display = 'none'; document.getElementById('1503.04581v1-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 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 15-034 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1411.4413">arXiv:1411.4413</a> <span> [<a href="https://arxiv.org/pdf/1411.4413">pdf</a>, <a href="https://arxiv.org/format/1411.4413">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="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/10.1038/nature14474">10.1038/nature14474 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observation of the rare $B^0_s\to渭^+渭^-$ decay from the combined analysis of CMS and LHCb data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=CMS%2C+T">The CMS</a>, <a href="/search/hep-ph?searchtype=author&query=Collaborations%2C+L">LHCb Collaborations</a>, <a href="/search/hep-ph?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ph?searchtype=author&query=Khachatryan%2C+V">V. Khachatryan</a>, <a href="/search/hep-ph?searchtype=author&query=Sirunyan%2C+A+M">A. M. Sirunyan</a>, <a href="/search/hep-ph?searchtype=author&query=Tumasyan%2C+A">A. Tumasyan</a>, <a href="/search/hep-ph?searchtype=author&query=Adam%2C+W">W. Adam</a>, <a href="/search/hep-ph?searchtype=author&query=Bergauer%2C+T">T. Bergauer</a>, <a href="/search/hep-ph?searchtype=author&query=Dragicevic%2C+M">M. Dragicevic</a>, <a href="/search/hep-ph?searchtype=author&query=Er%C3%B6%2C+J">J. Er枚</a>, <a href="/search/hep-ph?searchtype=author&query=Friedl%2C+M">M. Friedl</a>, <a href="/search/hep-ph?searchtype=author&query=Fr%C3%BChwirth%2C+R">R. Fr眉hwirth</a>, <a href="/search/hep-ph?searchtype=author&query=Ghete%2C+V+M">V. M. Ghete</a>, <a href="/search/hep-ph?searchtype=author&query=Hartl%2C+C">C. Hartl</a>, <a href="/search/hep-ph?searchtype=author&query=H%C3%B6rmann%2C+N">N. H枚rmann</a>, <a href="/search/hep-ph?searchtype=author&query=Hrubec%2C+J">J. Hrubec</a>, <a href="/search/hep-ph?searchtype=author&query=Jeitler%2C+M">M. Jeitler</a>, <a href="/search/hep-ph?searchtype=author&query=Kiesenhofer%2C+W">W. Kiesenhofer</a>, <a href="/search/hep-ph?searchtype=author&query=Kn%C3%BCnz%2C+V">V. Kn眉nz</a>, <a href="/search/hep-ph?searchtype=author&query=Krammer%2C+M">M. Krammer</a>, <a href="/search/hep-ph?searchtype=author&query=Kr%C3%A4tschmer%2C+I">I. Kr盲tschmer</a>, <a href="/search/hep-ph?searchtype=author&query=Liko%2C+D">D. Liko</a>, <a href="/search/hep-ph?searchtype=author&query=Mikulec%2C+I">I. Mikulec</a>, <a href="/search/hep-ph?searchtype=author&query=Rabady%2C+D">D. Rabady</a>, <a href="/search/hep-ph?searchtype=author&query=Rahbaran%2C+B">B. Rahbaran</a> , et al. (2807 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="1411.4413v2-abstract-short" style="display: inline;"> A joint measurement is presented of the branching fractions $B^0_s\to渭^+渭^-$ and $B^0\to渭^+渭^-$ in proton-proton collisions at the LHC by the CMS and LHCb experiments. The data samples were collected in 2011 at a centre-of-mass energy of 7 TeV, and in 2012 at 8 TeV. The combined analysis produces the first observation of the $B^0_s\to渭^+渭^-$ decay, with a statistical significance exceeding six sta… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1411.4413v2-abstract-full').style.display = 'inline'; document.getElementById('1411.4413v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1411.4413v2-abstract-full" style="display: none;"> A joint measurement is presented of the branching fractions $B^0_s\to渭^+渭^-$ and $B^0\to渭^+渭^-$ in proton-proton collisions at the LHC by the CMS and LHCb experiments. The data samples were collected in 2011 at a centre-of-mass energy of 7 TeV, and in 2012 at 8 TeV. The combined analysis produces the first observation of the $B^0_s\to渭^+渭^-$ decay, with a statistical significance exceeding six standard deviations, and the best measurement of its branching fraction so far. Furthermore, evidence for the $B^0\to渭^+渭^-$ decay is obtained with a statistical significance of three standard deviations. The branching fraction measurements are statistically compatible with SM predictions and impose stringent constraints on several theories beyond the SM. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1411.4413v2-abstract-full').style.display = 'none'; document.getElementById('1411.4413v2-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, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 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">Correspondence should be addressed to cms-and-lhcb-publication-committees@cern.ch</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-PH-EP-2014-220, CMS-BPH-13-007, LHCb-PAPER-2014-049 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature 522, 68-72 (04 June 2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1410.7007">arXiv:1410.7007</a> <span> [<a href="https://arxiv.org/pdf/1410.7007">pdf</a>, <a href="https://arxiv.org/format/1410.7007">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> </div> </div> <p class="title is-5 mathjax"> Nucleon PDF separation with the collider and fixed-target data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Alekhin%2C+S">S. Alekhin</a>, <a href="/search/hep-ph?searchtype=author&query=Bluemlein%2C+J">J. Bluemlein</a>, <a href="/search/hep-ph?searchtype=author&query=Caminada%2C+L">L. Caminada</a>, <a href="/search/hep-ph?searchtype=author&query=Lipka%2C+K">K. Lipka</a>, <a href="/search/hep-ph?searchtype=author&query=Lohwasser%2C+K">K. Lohwasser</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S">S. Moch</a>, <a href="/search/hep-ph?searchtype=author&query=Petti%2C+R">R. Petti</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</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="1410.7007v2-abstract-short" style="display: inline;"> We consider the impact of the recent data obtained by the LHC, Tevatron, and fixed-target experiments on the nucleon quark distributions with a particular focus on disentangling different quark species. An improved determination of the poorly known strange sea distribution is obtained due to including data from the neutrino-induced deep-inelastic scattering experiments NOMAD and CHORUS. The impact… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1410.7007v2-abstract-full').style.display = 'inline'; document.getElementById('1410.7007v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1410.7007v2-abstract-full" style="display: none;"> We consider the impact of the recent data obtained by the LHC, Tevatron, and fixed-target experiments on the nucleon quark distributions with a particular focus on disentangling different quark species. An improved determination of the poorly known strange sea distribution is obtained due to including data from the neutrino-induced deep-inelastic scattering experiments NOMAD and CHORUS. The impact of the associated (W + c) production data by CMS and ATLAS on the strange sea determination is also studied and a comparison with earlier results based on the collider data is discussed. Finally, the recent LHC and Tevatron data on the charged lepton asymmetry are compared to the NNLO ABM predictions and the potential of this input in improving the non-strange sea distributions is evaluated. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1410.7007v2-abstract-full').style.display = 'none'; document.getElementById('1410.7007v2-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 February, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 October, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">Few typos fixed</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 14-196, LPN 14-120, SFB/CPP-14-81 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1410.4412">arXiv:1410.4412</a> <span> [<a href="https://arxiv.org/pdf/1410.4412">pdf</a>, <a href="https://arxiv.org/format/1410.4412">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> </div> </div> <p class="title is-5 mathjax"> HERAFitter, Open Source QCD Fit Project </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Alekhin%2C+S">S. Alekhin</a>, <a href="/search/hep-ph?searchtype=author&query=Behnke%2C+O">O. Behnke</a>, <a href="/search/hep-ph?searchtype=author&query=Belov%2C+P">P. Belov</a>, <a href="/search/hep-ph?searchtype=author&query=Borroni%2C+S">S. Borroni</a>, <a href="/search/hep-ph?searchtype=author&query=Botje%2C+M">M. Botje</a>, <a href="/search/hep-ph?searchtype=author&query=Britzger%2C+D">D. Britzger</a>, <a href="/search/hep-ph?searchtype=author&query=Camarda%2C+S">S. Camarda</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A+M">A. M. Cooper-Sarkar</a>, <a href="/search/hep-ph?searchtype=author&query=Daum%2C+K">K. Daum</a>, <a href="/search/hep-ph?searchtype=author&query=Diaconu%2C+C">C. Diaconu</a>, <a href="/search/hep-ph?searchtype=author&query=Feltesse%2C+J">J. Feltesse</a>, <a href="/search/hep-ph?searchtype=author&query=Gizhko%2C+A">A. Gizhko</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">A. Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Guffanti%2C+A">A. Guffanti</a>, <a href="/search/hep-ph?searchtype=author&query=Guzzi%2C+M">M. Guzzi</a>, <a href="/search/hep-ph?searchtype=author&query=Hautmann%2C+F">F. Hautmann</a>, <a href="/search/hep-ph?searchtype=author&query=Jung%2C+A">A. Jung</a>, <a href="/search/hep-ph?searchtype=author&query=Jung%2C+H">H. Jung</a>, <a href="/search/hep-ph?searchtype=author&query=Kolesnikov%2C+V">V. Kolesnikov</a>, <a href="/search/hep-ph?searchtype=author&query=Kowalski%2C+H">H. Kowalski</a>, <a href="/search/hep-ph?searchtype=author&query=Kuprash%2C+O">O. Kuprash</a>, <a href="/search/hep-ph?searchtype=author&query=Kusina%2C+A">A. Kusina</a>, <a href="/search/hep-ph?searchtype=author&query=Levonian%2C+S">S. Levonian</a>, <a href="/search/hep-ph?searchtype=author&query=Lipka%2C+K">K. Lipka</a>, <a href="/search/hep-ph?searchtype=author&query=Lobodzinski%2C+B">B. Lobodzinski</a> , et al. (28 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="1410.4412v3-abstract-short" style="display: inline;"> HERAFitter is an open-source package that provides a framework for the determination of the parton distribution functions (PDFs) of the proton and for many different kinds of analyses in Quantum Chromodynamics (QCD). It encodes results from a wide range of experimental measurements in lepton-proton deep inelastic scattering and proton-proton (proton-antiproton) collisions at hadron colliders. Thes… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1410.4412v3-abstract-full').style.display = 'inline'; document.getElementById('1410.4412v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1410.4412v3-abstract-full" style="display: none;"> HERAFitter is an open-source package that provides a framework for the determination of the parton distribution functions (PDFs) of the proton and for many different kinds of analyses in Quantum Chromodynamics (QCD). It encodes results from a wide range of experimental measurements in lepton-proton deep inelastic scattering and proton-proton (proton-antiproton) collisions at hadron colliders. These are complemented with a variety of theoretical options for calculating PDF-dependent cross section predictions corresponding to the measurements. The framework covers a large number of the existing methods and schemes used for PDF determination. The data and theoretical predictions are brought together through numerous methodological options for carrying out PDF fits and plotting tools to help visualise the results. While primarily based on the approach of collinear factorisation, HERAFitter also provides facilities for fits of dipole models and transverse-momentum dependent PDFs. The package can be used to study the impact of new precise measurements from hadron colliders. This paper describes the general structure of HERAFitter and its wide choice of options. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1410.4412v3-abstract-full').style.display = 'none'; document.getElementById('1410.4412v3-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 May, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 October, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">18 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY Report 14-188 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1404.6469">arXiv:1404.6469</a> <span> [<a href="https://arxiv.org/pdf/1404.6469">pdf</a>, <a href="https://arxiv.org/ps/1404.6469">ps</a>, <a href="https://arxiv.org/format/1404.6469">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> </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.91.094002">10.1103/PhysRevD.91.094002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Determination of Strange Sea Quark Distributions from Fixed-target and Collider Data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Alekhin%2C+S">S. Alekhin</a>, <a href="/search/hep-ph?searchtype=author&query=Bluemlein%2C+J">J. Bluemlein</a>, <a href="/search/hep-ph?searchtype=author&query=Caminadac%2C+L">L. Caminadac</a>, <a href="/search/hep-ph?searchtype=author&query=Lipka%2C+K">K. Lipka</a>, <a href="/search/hep-ph?searchtype=author&query=Lohwasser%2C+K">K. Lohwasser</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S">S. Moch</a>, <a href="/search/hep-ph?searchtype=author&query=Petti%2C+R">R. Petti</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</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="1404.6469v1-abstract-short" style="display: inline;"> We present an improved determination of the strange sea distribution in the nucleon with constraints coming from the recent charm production data in neutrino-nucleon deep-inelastic scattering by the NOMAD and CHORUS experiments and from charged current inclusive deep-inelastic scattering at HERA. We demonstrate that the results are consistent with the data from the ATLAS and the CMS experiments on… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.6469v1-abstract-full').style.display = 'inline'; document.getElementById('1404.6469v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1404.6469v1-abstract-full" style="display: none;"> We present an improved determination of the strange sea distribution in the nucleon with constraints coming from the recent charm production data in neutrino-nucleon deep-inelastic scattering by the NOMAD and CHORUS experiments and from charged current inclusive deep-inelastic scattering at HERA. We demonstrate that the results are consistent with the data from the ATLAS and the CMS experiments on the associated production of $W^\pm$-bosons with $c$-quarks. We also discuss issues related to the recent strange sea determination by the ATLAS experiment using LHC collider data. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.6469v1-abstract-full').style.display = 'none'; document.getElementById('1404.6469v1-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 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">23 pages, 14 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 14-055, DO-TH 14/06, LPN 14-063, SFB/CPP-14-21, MITP/14-031 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 91, 094002 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1404.4234">arXiv:1404.4234</a> <span> [<a href="https://arxiv.org/pdf/1404.4234">pdf</a>, <a href="https://arxiv.org/format/1404.4234">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> </div> </div> <p class="title is-5 mathjax"> Parton distribution functions at LO, NLO and NNLO with correlated uncertainties between orders </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=team%2C+H+d">HERAFitter developers' team</a>, <a href="/search/hep-ph?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ph?searchtype=author&query=Belov%2C+P">P. Belov</a>, <a href="/search/hep-ph?searchtype=author&query=Britzger%2C+D">D. Britzger</a>, <a href="/search/hep-ph?searchtype=author&query=Camarda%2C+S">S. Camarda</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A+M">A. M. Cooper-Sarkar</a>, <a href="/search/hep-ph?searchtype=author&query=Diaconu%2C+C">C. Diaconu</a>, <a href="/search/hep-ph?searchtype=author&query=Feltesse%2C+J">J. Feltesse</a>, <a href="/search/hep-ph?searchtype=author&query=Gizhko%2C+A">A. Gizhko</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">A. Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Kolesnikov%2C+V">V. Kolesnikov</a>, <a href="/search/hep-ph?searchtype=author&query=Lohwasser%2C+K">K. Lohwasser</a>, <a href="/search/hep-ph?searchtype=author&query=Luszczak%2C+A">A. Luszczak</a>, <a href="/search/hep-ph?searchtype=author&query=Myronenko%2C+V">V. Myronenko</a>, <a href="/search/hep-ph?searchtype=author&query=Pirumov%2C+H">H. Pirumov</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">R. Placakyte</a>, <a href="/search/hep-ph?searchtype=author&query=Rabbertz%2C+K">K. Rabbertz</a>, <a href="/search/hep-ph?searchtype=author&query=Radescu%2C+V">V. Radescu</a>, <a href="/search/hep-ph?searchtype=author&query=Sapronov%2C+A">A. Sapronov</a>, <a href="/search/hep-ph?searchtype=author&query=Schoening%2C+A">A. Schoening</a>, <a href="/search/hep-ph?searchtype=author&query=Shushkevich%2C+S">S. Shushkevich</a>, <a href="/search/hep-ph?searchtype=author&query=Slominski%2C+W">W. Slominski</a>, <a href="/search/hep-ph?searchtype=author&query=Starovoitov%2C+P">P. Starovoitov</a>, <a href="/search/hep-ph?searchtype=author&query=Sutton%2C+M">M. Sutton</a>, <a href="/search/hep-ph?searchtype=author&query=Tomaszewska%2C+J">J. Tomaszewska</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="1404.4234v2-abstract-short" style="display: inline;"> Sets of parton distribution functions (PDFs) of the proton are reported for the leading (LO), next-to-leading (NLO) and next-to-next-to leading order (NNLO) QCD calculations. The parton distribution functions are determined with the HERAFitter program using the data from the HERA experiments and preserving correlations between uncertainties for the LO, NLO and NNLO PDF sets. The sets are used to s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.4234v2-abstract-full').style.display = 'inline'; document.getElementById('1404.4234v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1404.4234v2-abstract-full" style="display: none;"> Sets of parton distribution functions (PDFs) of the proton are reported for the leading (LO), next-to-leading (NLO) and next-to-next-to leading order (NNLO) QCD calculations. The parton distribution functions are determined with the HERAFitter program using the data from the HERA experiments and preserving correlations between uncertainties for the LO, NLO and NNLO PDF sets. The sets are used to study cross-section ratios and their uncertainties when calculated at different orders in QCD. A reduction of the overall theoretical uncertainty is observed if correlations between the PDF sets are taken into account for the ratio of $WW$ di-boson to $Z$ boson production cross sections at the LHC. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1404.4234v2-abstract-full').style.display = 'none'; document.getElementById('1404.4234v2-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, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 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">10 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY-2014-054 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1211.5102">arXiv:1211.5102</a> <span> [<a href="https://arxiv.org/pdf/1211.5102">pdf</a>, <a href="https://arxiv.org/format/1211.5102">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="High Energy Physics - Phenomenology">hep-ph</span> </div> </div> <p class="title is-5 mathjax"> On the Relation of the LHeC and the LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Fernandez%2C+J+L+A">J. L. Abelleira Fernandez</a>, <a href="/search/hep-ph?searchtype=author&query=Adolphsen%2C+C">C. Adolphsen</a>, <a href="/search/hep-ph?searchtype=author&query=Adzic%2C+P">P. Adzic</a>, <a href="/search/hep-ph?searchtype=author&query=Akay%2C+A+N">A. N. Akay</a>, <a href="/search/hep-ph?searchtype=author&query=Aksakal%2C+H">H. Aksakal</a>, <a href="/search/hep-ph?searchtype=author&query=Albacete%2C+J+L">J. L. Albacete</a>, <a href="/search/hep-ph?searchtype=author&query=Allanach%2C+B">B. Allanach</a>, <a href="/search/hep-ph?searchtype=author&query=Alekhin%2C+S">S. Alekhin</a>, <a href="/search/hep-ph?searchtype=author&query=Allport%2C+P">P. Allport</a>, <a href="/search/hep-ph?searchtype=author&query=Andreev%2C+V">V. Andreev</a>, <a href="/search/hep-ph?searchtype=author&query=Appleby%2C+R+B">R. B. Appleby</a>, <a href="/search/hep-ph?searchtype=author&query=Arikan%2C+E">E. Arikan</a>, <a href="/search/hep-ph?searchtype=author&query=Armesto%2C+N">N. Armesto</a>, <a href="/search/hep-ph?searchtype=author&query=Azuelos%2C+G">G. Azuelos</a>, <a href="/search/hep-ph?searchtype=author&query=Bai%2C+M">M. Bai</a>, <a href="/search/hep-ph?searchtype=author&query=Barber%2C+D">D. Barber</a>, <a href="/search/hep-ph?searchtype=author&query=Bartels%2C+J">J. Bartels</a>, <a href="/search/hep-ph?searchtype=author&query=Behnke%2C+O">O. Behnke</a>, <a href="/search/hep-ph?searchtype=author&query=Behr%2C+J">J. Behr</a>, <a href="/search/hep-ph?searchtype=author&query=Belyaev%2C+A+S">A. S. Belyaev</a>, <a href="/search/hep-ph?searchtype=author&query=Ben-Zvi%2C+I">I. Ben-Zvi</a>, <a href="/search/hep-ph?searchtype=author&query=Bernard%2C+N">N. Bernard</a>, <a href="/search/hep-ph?searchtype=author&query=Bertolucci%2C+S">S. Bertolucci</a>, <a href="/search/hep-ph?searchtype=author&query=Bettoni%2C+S">S. Bettoni</a>, <a href="/search/hep-ph?searchtype=author&query=Biswal%2C+S">S. Biswal</a> , et al. (184 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="1211.5102v2-abstract-short" style="display: inline;"> The present note relies on the recently published conceptual design report of the LHeC and extends the first contribution to the European strategy debate in emphasising the role of the LHeC to complement and complete the high luminosity LHC programme. The brief discussion therefore focuses on the importance of high precision PDF and $伪_s$ determinations for the physics beyond the Standard Model (G… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.5102v2-abstract-full').style.display = 'inline'; document.getElementById('1211.5102v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1211.5102v2-abstract-full" style="display: none;"> The present note relies on the recently published conceptual design report of the LHeC and extends the first contribution to the European strategy debate in emphasising the role of the LHeC to complement and complete the high luminosity LHC programme. The brief discussion therefore focuses on the importance of high precision PDF and $伪_s$ determinations for the physics beyond the Standard Model (GUTs, SUSY, Higgs). Emphasis is also given to the importance of high parton density phenomena in nuclei and their relevance to the heavy ion physics programme at the LHC. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.5102v2-abstract-full').style.display = 'none'; document.getElementById('1211.5102v2-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 January, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 November, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2012. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1207.0353">arXiv:1207.0353</a> <span> [<a href="https://arxiv.org/pdf/1207.0353">pdf</a>, <a href="https://arxiv.org/ps/1207.0353">ps</a>, <a href="https://arxiv.org/format/1207.0353">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> </div> </div> <p class="title is-5 mathjax"> Summary of the Structure Functions Working group at DIS 2012 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A">Amanda Cooper-Sarkar</a>, <a href="/search/hep-ph?searchtype=author&query=Jimenez-Delgado%2C+P">Pedro Jimenez-Delgado</a>, <a href="/search/hep-ph?searchtype=author&query=Pla%C4%8Dakyt%C4%97%2C+R">Ringail臈 Pla膷akyt臈</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="1207.0353v1-abstract-short" style="display: inline;"> A summary of the recent experimental, phenomenological and theoretical results presented in the Structure Functions working group at DIS2012 workshop. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1207.0353v1-abstract-full" style="display: none;"> A summary of the recent experimental, phenomenological and theoretical results presented in the Structure Functions working group at DIS2012 workshop. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1207.0353v1-abstract-full').style.display = 'none'; document.getElementById('1207.0353v1-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 July, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">12 pages, 9 figures, to be published in the Proceedings of the XX International Workshop on Deep Inelastic Scattering, University of Bonn, 26-30th March 2012</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> JLAB-THY-12-1589 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1111.5452">arXiv:1111.5452</a> <span> [<a href="https://arxiv.org/pdf/1111.5452">pdf</a>, <a href="https://arxiv.org/ps/1111.5452">ps</a>, <a href="https://arxiv.org/format/1111.5452">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> </div> </div> <p class="title is-5 mathjax"> Parton Distribution Functions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">Ringaile Placakyte</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="1111.5452v4-abstract-short" style="display: inline;"> The parton distribution functions (PDFs) of the proton, a necessary input to almost all theory predictions for hadron colliders, are reviewed in this document. An introduction to the PDF determination by global analyses of the main PDF fitting groups with an emphasis on HERA PDFs is presented. Finally, theory predictions based on different PDFs are compared to some recent relevant LHC and Tevatron… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1111.5452v4-abstract-full').style.display = 'inline'; document.getElementById('1111.5452v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1111.5452v4-abstract-full" style="display: none;"> The parton distribution functions (PDFs) of the proton, a necessary input to almost all theory predictions for hadron colliders, are reviewed in this document. An introduction to the PDF determination by global analyses of the main PDF fitting groups with an emphasis on HERA PDFs is presented. Finally, theory predictions based on different PDFs are compared to some recent relevant LHC and Tevatron measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1111.5452v4-abstract-full').style.display = 'none'; document.getElementById('1111.5452v4-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 December, 2011; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 November, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">7 pages, 14 figures, to appear in the proceedings of XXXI Physics in Collision, Vancouver, BC Canada, 28 Aug-1 Sep, 2011</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1009.5833">arXiv:1009.5833</a> <span> [<a href="https://arxiv.org/pdf/1009.5833">pdf</a>, <a href="https://arxiv.org/ps/1009.5833">ps</a>, <a href="https://arxiv.org/format/1009.5833">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="High Energy Physics - Phenomenology">hep-ph</span> </div> </div> <p class="title is-5 mathjax"> Parton densities from DIS and hadron colliders to LHC: WG summary </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Alekhin%2C+S">Sergey Alekhin</a>, <a href="/search/hep-ph?searchtype=author&query=Colferai%2C+D">Dimitri Colferai</a>, <a href="/search/hep-ph?searchtype=author&query=Huston%2C+J">Joey Huston</a>, <a href="/search/hep-ph?searchtype=author&query=Placakyte%2C+R">Ringaile Placakyte</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="1009.5833v1-abstract-short" style="display: inline;"> Recent experimental and theoretical results presented in the working group "Parton densities from DIS and hadron colliders to LHC" at the DIS2010 workshop are summarized in this contribution. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1009.5833v1-abstract-full" style="display: none;"> Recent experimental and theoretical results presented in the working group "Parton densities from DIS and hadron colliders to LHC" at the DIS2010 workshop are summarized in this contribution. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1009.5833v1-abstract-full').style.display = 'none'; document.getElementById('1009.5833v1-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 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">XVIII International Workshop on Deep-Inelastic Scattering and Related Subjects, April 19 -23, 2010, Florence, Italy</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> PoS DIS2010:013,2010 </p> </li> </ol> <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" 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