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<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/2412.20259">arXiv:2412.20259</a> <span> [<a href="https://arxiv.org/pdf/2412.20259">pdf</a>, <a href="https://arxiv.org/format/2412.20259">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/10.22323/1.478.0320">10.22323/1.478.0320 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Top-quark pole mass extraction at NNLO accuracy </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=Garzelli%2C+M+V">M. V. Garzelli</a>, <a href="/search/hep-ph?searchtype=author&query=Mazzitelli%2C+J">J. Mazzitelli</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S+-">S. -O. Moch</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="2412.20259v1-abstract-short" style="display: inline;"> We describe our recent NNLO QCD extraction of the top-quark pole mass from fits to experimental data on total inclusive and normalized (multi)-differential cross sections for $t\bar{t} + X$ hadroproduction, using as input various modern PDF + $伪_s(M_Z)$ sets. We find top-quark mass values compatible among each other and with the PDG 2024 preferred value. </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.20259v1-abstract-full" style="display: none;"> We describe our recent NNLO QCD extraction of the top-quark pole mass from fits to experimental data on total inclusive and normalized (multi)-differential cross sections for $t\bar{t} + X$ hadroproduction, using as input various modern PDF + $伪_s(M_Z)$ sets. We find top-quark mass values compatible among each other and with the PDG 2024 preferred value. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.20259v1-abstract-full').style.display = 'none'; document.getElementById('2412.20259v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 2 figures, invited contribution to the Proceedings of the 12th Large Hadron Collider Physics Conference (LHCP2024), Boston, USA, 3-7 June 2024</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-TH-2024-225 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> PoS LHCP2024 (2025) 320 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.16685">arXiv:2412.16685</a> <span> [<a href="https://arxiv.org/pdf/2412.16685">pdf</a>, <a href="https://arxiv.org/format/2412.16685">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"> Updated predictions for toponium production at the LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Garzelli%2C+M+V">M. V. Garzelli</a>, <a href="/search/hep-ph?searchtype=author&query=Limatola%2C+G">G. Limatola</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S+-">S. -O. Moch</a>, <a href="/search/hep-ph?searchtype=author&query=Steinhauser%2C+M">M. Steinhauser</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="2412.16685v1-abstract-short" style="display: inline;"> We provide an update on QCD predictions for top-quark pair production close to threshold including bound state effects at the Large Hadron Collider. We compute the top-quark pair invariant mass distribution $d蟽/dM_{t\bar{t}}$, including Coulomb resummation for bound-state effects, as well as threshold resummation for emissions of soft and collinear gluons. We discuss uncertainty estimates and pres… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.16685v1-abstract-full').style.display = 'inline'; document.getElementById('2412.16685v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.16685v1-abstract-full" style="display: none;"> We provide an update on QCD predictions for top-quark pair production close to threshold including bound state effects at the Large Hadron Collider. We compute the top-quark pair invariant mass distribution $d蟽/dM_{t\bar{t}}$, including Coulomb resummation for bound-state effects, as well as threshold resummation for emissions of soft and collinear gluons. We discuss uncertainty estimates and present a proposal for the use of these predictions in experimental analyses. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.16685v1-abstract-full').style.display = 'none'; document.getElementById('2412.16685v1-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, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </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 LaTeX, 4 figures; 2 ancillary files with cross section predictions</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-TH-2024-222, DESY 24-207, P3H-24-104, TTP24-048 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.14348">arXiv:2412.14348</a> <span> [<a href="https://arxiv.org/pdf/2412.14348">pdf</a>, <a href="https://arxiv.org/format/2412.14348">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/10.22323/1.476.0393">10.22323/1.476.0393 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> NNLO fits of top-quark mass using total, single-differential and double-differential $t\bar{t}+X$ cross-section 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=Garzelli%2C+M+V">M. V. Garzelli</a>, <a href="/search/hep-ph?searchtype=author&query=Mazzitelli%2C+J">J. Mazzitelli</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S+-">S. -O. Moch</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="2412.14348v1-abstract-short" style="display: inline;"> We describe the fits of the top-quark mass value at NNLO using as input the double-differential distributions in rapidity and invariant mass of $t\bar{t}$ pairs obtained by the ATLAS and CMS collaborations from unfolding of their experimental data to the parton level, compared to NNLO theory predictions. We consider different state-of-the-art PDF sets, finding results of the fits compatible among… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.14348v1-abstract-full').style.display = 'inline'; document.getElementById('2412.14348v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.14348v1-abstract-full" style="display: none;"> We describe the fits of the top-quark mass value at NNLO using as input the double-differential distributions in rapidity and invariant mass of $t\bar{t}$ pairs obtained by the ATLAS and CMS collaborations from unfolding of their experimental data to the parton level, compared to NNLO theory predictions. We consider different state-of-the-art PDF sets, finding results of the fits compatible among each other within uncertainties. On the other hand, we observe some tension among the fits to different datasets. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.14348v1-abstract-full').style.display = 'none'; document.getElementById('2412.14348v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </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">Contribution to proceedings of the 42nd International Conference on High Energy Physics (ICHEP 2024), 18-24 July 2024</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-TH-2024-220 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> PoS ICHEP2024 (2025) 393 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2408.07048">arXiv:2408.07048</a> <span> [<a href="https://arxiv.org/pdf/2408.07048">pdf</a>, <a href="https://arxiv.org/format/2408.07048">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 Updates: Probing Z Boson Couplings with Forward-Backward Asymmetry </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">Oleksandr 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="2408.07048v1-abstract-short" style="display: inline;"> We present recent updates in the xFitter software framework for global fits of parton distribution functions in high-energy physics. Our focus is on investigating the sensitivity to Z boson couplings using the forward-backward asymmetry in Drell-Yan production. By utilizing an effective approach and simulated data, we assess the accuracy of these couplings, specifically considering the full LHC da… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.07048v1-abstract-full').style.display = 'inline'; document.getElementById('2408.07048v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2408.07048v1-abstract-full" style="display: none;"> We present recent updates in the xFitter software framework for global fits of parton distribution functions in high-energy physics. Our focus is on investigating the sensitivity to Z boson couplings using the forward-backward asymmetry in Drell-Yan production. By utilizing an effective approach and simulated data, we assess the accuracy of these couplings, specifically considering the full LHC data sample. Furthermore, we compare our results with predictions for future colliders, providing insights into their potential impact on understanding Z boson interactions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.07048v1-abstract-full').style.display = 'none'; document.getElementById('2408.07048v1-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 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures, contribution to the XXXI International Workshop on Deep Inelastic Scattering and Related Subjects (DIS2024)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.16061">arXiv:2407.16061</a> <span> [<a href="https://arxiv.org/pdf/2407.16061">pdf</a>, <a href="https://arxiv.org/format/2407.16061">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 framework for simultaneous fit of QCD and BSM parameters with xFitter </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Shen%2C+X">XiaoMin Shen</a>, <a href="/search/hep-ph?searchtype=author&query=Amoroso%2C+S">Simone Amoroso</a>, <a href="/search/hep-ph?searchtype=author&query=Gao%2C+J">Jun Gao</a>, <a href="/search/hep-ph?searchtype=author&query=Lipka%2C+K">Katerina Lipka</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">Oleksandr 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="2407.16061v2-abstract-short" style="display: inline;"> An extension of the xFitter open-source program for QCD analyses is presented, allowing for a polynomial parameterization of the dependence of physical observables on theoretical parameters. This extension enables simultaneous determination of parton distribution functions (PDFs) and new physics parameters within the framework of the Standard Model Effective Field Theory (SMEFT). The functionaliti… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.16061v2-abstract-full').style.display = 'inline'; document.getElementById('2407.16061v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.16061v2-abstract-full" style="display: none;"> An extension of the xFitter open-source program for QCD analyses is presented, allowing for a polynomial parameterization of the dependence of physical observables on theoretical parameters. This extension enables simultaneous determination of parton distribution functions (PDFs) and new physics parameters within the framework of the Standard Model Effective Field Theory (SMEFT). The functionalities of the code are illustrated in a sensitivity study, where a simultaneous determination of the PDFs, top quark mass and the couplings of selected dimension-6 SMEFT operators is addressed using projections for measurements of top quark-antiquark pair production at the High-Luminosity LHC. The importance of considering all the correlations of the parton distributions, top quark mass and the EFT parameters in a simultaneous QCD+SMEFT analysis is demonstrated. This work serves as a new platform for simultaneous extraction of the PDFs and the SM/SMEFT parameters based on xFitter. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.16061v2-abstract-full').style.display = 'none'; document.getElementById('2407.16061v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2024. </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">31 pages, 10 figures; published version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY-24-119 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.00545">arXiv:2407.00545</a> <span> [<a href="https://arxiv.org/pdf/2407.00545">pdf</a>, <a href="https://arxiv.org/format/2407.00545">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/s10052-025-13832-8">10.1140/epjc/s10052-025-13832-8 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> NNLO PDFs driven by top-quark 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=Garzelli%2C+M+V">M. V. Garzelli</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S+-">S. -O. Moch</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="2407.00545v2-abstract-short" style="display: inline;"> We study the impact of state-of-the-art top-quark data collected at the Large Hadron Collider on parton distribution functions (PDFs). Following the ABMP methodology, the fit extracts simultaneously proton PDFs, the strong coupling $伪_s(M_Z)$ and heavy-quark masses at next-to-next-to-leading order (NNLO) accuracy in QCD. It includes recent high-statistics data on absolute total inclusive cross sec… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.00545v2-abstract-full').style.display = 'inline'; document.getElementById('2407.00545v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.00545v2-abstract-full" style="display: none;"> We study the impact of state-of-the-art top-quark data collected at the Large Hadron Collider on parton distribution functions (PDFs). Following the ABMP methodology, the fit extracts simultaneously proton PDFs, the strong coupling $伪_s(M_Z)$ and heavy-quark masses at next-to-next-to-leading order (NNLO) accuracy in QCD. It includes recent high-statistics data on absolute total inclusive cross sections for $t\bar{t}+X$, the sum of $(t + X)$ and $(\bar{t} + X)$ hadroproduction, and normalized inclusive data double-differential in the invariant mass and rapidity of the $t\bar{t}$ pair at $\sqrt{S}=13$ TeV. The gluon PDF at large $x$ and the top-quark mass value derived from these data are well compatible with the previous ABMP16 results, but with significantly smaller uncertainties, reduced by up to a factor of two. At NNLO in QCD we obtain for the strong coupling the value $伪_s^{(n_f=5)}(M_Z)= 0.1150 \pm 0.0009$ and for the top-quark mass in the ${\overline{\mbox{MS}}}$-scheme $m_t(m_t) = 160.6 \pm 0.6$ GeV, corresponding to $m_t^{\rm pole} = 170.2 \pm 0.7$ GeV in the on-shell scheme. The new fit, dubbed ABMPtt, is publicly released in grids in LHAPDF format. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.00545v2-abstract-full').style.display = 'none'; document.getElementById('2407.00545v2-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2024. </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">33 pages, 22 figures, 4 tables, interpolation tables for top-antitop production available at https://ploughshare.web.cern.ch v2: minor revision accounting for the comments of the Referee, to be published in EPJC</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 24-092 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 85 (2025) 162, 1 - 25 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.03581">arXiv:2406.03581</a> <span> [<a href="https://arxiv.org/pdf/2406.03581">pdf</a>, <a href="https://arxiv.org/format/2406.03581">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"> Charm total cross sections with nonuniversal fragmentation treatment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Geiser%2C+A">A. Geiser</a>, <a href="/search/hep-ph?searchtype=author&query=Yang%2C+Y">Y. Yang</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> </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="2406.03581v1-abstract-short" style="display: inline;"> Total charm-pair cross sections in $pp$ collisions are interesting because they can be calculated to NNLO in QCD without any reference to fragmentation effects. On the other hand, the fiducial differential charm cross sections from which the total cross sections must be extrapolated are currently known to NLO+NLL at most (e.g. FONLL), and must be treated for known effects of nonuniversal charm fra… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.03581v1-abstract-full').style.display = 'inline'; document.getElementById('2406.03581v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.03581v1-abstract-full" style="display: none;"> Total charm-pair cross sections in $pp$ collisions are interesting because they can be calculated to NNLO in QCD without any reference to fragmentation effects. On the other hand, the fiducial differential charm cross sections from which the total cross sections must be extrapolated are currently known to NLO+NLL at most (e.g. FONLL), and must be treated for known effects of nonuniversal charm fragmentation. A new procedure using the FONLL framework as input for an empirical parametrization of the data in both shape and normalization, with all its parameters actually fitted to data, is used to derive so-called data-driven FONLL (ddFONLL) parametrizations which can be used to extrapolate the differential cross sections to total cross sections with minimal bias. This includes an empirical treatment of all known non-universal charm fragmentation effects, in particular for the baryon-to-meson ratio as a function of transverse momentum. The total charm-pair cross sections obtained in this way, which supersede all previous ones obtained using the assumption of charm-fragmentation universality, are consistent with NNLO predictions, and allow first studies of their sensitivity e.g. to the charm-quark mass and/or the NNLO gluon PDF at very low transverse momentum fractions $x$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.03581v1-abstract-full').style.display = 'none'; document.getElementById('2406.03581v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </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, 6 Figures, contribution to the 2024 QCD session of the 58th Rencontres de Moriond</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.10230">arXiv:2311.10230</a> <span> [<a href="https://arxiv.org/pdf/2311.10230">pdf</a>, <a href="https://arxiv.org/format/2311.10230">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"> Compatibility between theoretical predictions and experimental data for top-antitop hadroproduction at NNLO QCD accuracy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Garzelli%2C+M+V">Maria Vittoria Garzelli</a>, <a href="/search/hep-ph?searchtype=author&query=Mazzitelli%2C+J">Javier Mazzitelli</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S">Sven-Olaf Moch</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">Oleksandr 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="2311.10230v2-abstract-short" style="display: inline;"> We compare double-differential normalized production cross sections for top-antitop $+ X$ hadroproduction at NNLO QCD accuracy, as obtained through a customized version of the MATRIX framework interfaced to PineAPPL, with recent data by the ATLAS and CMS collaborations. We take into account theory uncertainties due to scale variation and we see how predictions vary as a function of parton distribu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.10230v2-abstract-full').style.display = 'inline'; document.getElementById('2311.10230v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.10230v2-abstract-full" style="display: none;"> We compare double-differential normalized production cross sections for top-antitop $+ X$ hadroproduction at NNLO QCD accuracy, as obtained through a customized version of the MATRIX framework interfaced to PineAPPL, with recent data by the ATLAS and CMS collaborations. We take into account theory uncertainties due to scale variation and we see how predictions vary as a function of parton distribution function (PDF) choice and top-quark pole mass value, considering different state-of-the-art PDF fits with their uncertainties. Notwithstanding the overall reasonable good agreement, we observe discrepancies at the level of a few $蟽$'s between data and theoretical predictions in some kinematical regions, which can be alleviated by refitting the top-quark mass value, and/or the PDFs and/or $伪_s(M_Z)$, considering the correlations between these three quantities. In a fit of top-quark mass standalone, we notice that, for all considered PDF + $伪_s(M_Z)$ sets used as input, some datasets point towards top-quark pole mass values lower by about $2\,蟽$'s than those emerging from fitting other datasets, suggesting a possible tension between experimental measurements using different decay channels, and/or the need of better estimating uncertainties on the latter. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.10230v2-abstract-full').style.display = 'none'; document.getElementById('2311.10230v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 2 figures, talk at "The European Physical Society Conference on High Energy Physics (EPS-HEP2023)", 21-25 August 2023, Hamburg, Germany; submitted to PoS - Proceedings of Science</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.05509">arXiv:2311.05509</a> <span> [<a href="https://arxiv.org/pdf/2311.05509">pdf</a>, <a href="https://arxiv.org/format/2311.05509">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(2024)321">10.1007/JHEP05(2024)321 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Top-quark pole mass extraction at NNLO accuracy, from total, single- and double-differential cross sections for $t\bar{t}+X$ production at the LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Garzelli%2C+M+V">M. V. Garzelli</a>, <a href="/search/hep-ph?searchtype=author&query=Mazzitelli%2C+J">J. Mazzitelli</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S+-">S. -O. Moch</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="2311.05509v3-abstract-short" style="display: inline;"> We extract the top-quark mass value in the on-shell renormalization scheme from the comparison of theoretical predictions for $pp \rightarrow t\bar{t} + X$ at next-to-next-to-leading order (NNLO) QCD accuracy with experimental data collected by the ATLAS and CMS collaborations for absolute total, normalized single-differential and double-differential cross-sections during Run 1, Run 2 and the ongo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.05509v3-abstract-full').style.display = 'inline'; document.getElementById('2311.05509v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.05509v3-abstract-full" style="display: none;"> We extract the top-quark mass value in the on-shell renormalization scheme from the comparison of theoretical predictions for $pp \rightarrow t\bar{t} + X$ at next-to-next-to-leading order (NNLO) QCD accuracy with experimental data collected by the ATLAS and CMS collaborations for absolute total, normalized single-differential and double-differential cross-sections during Run 1, Run 2 and the ongoing Run 3 at the Large Hadron Collider (LHC). For the theory computations of heavy-quark pair-production we use the MATRIX framework, interfaced to PineAPPL for the generation of grids of theory predictions, which can be efficiently used a-posteriori during the fit, performed within xFitter. We take several state-of-the-art parton distribution functions (PDFs) as input for the fit and evaluate their associated uncertainties, as well as the uncertainties arising from renormalization and factorization scale variation. Fit uncertainties related to the datasets are also part of the extracted uncertainty of the top-quark mass and turn out to be of similar size as the combined scale and PDF uncertainty. Fit results from different PDF sets agree among each other within 1$蟽$ uncertainty, whereas some datasets related to $t\bar{t}$ decay in different channels (dileptonic vs. semileptonic) point towards top-quark mass values in slight tension among each other, although still compatible within $2.5 蟽$ accuracy. Our results are compatible with the PDG 2022 top-quark pole-mass value. Our work opens the road towards more complex simultaneous NNLO fits of PDFs, the strong coupling $伪_s(M_Z)$ and the top-quark mass, using the currently most precise experimental data on $t\bar{t} + X$ total and multi-differential cross-sections from the LHC. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.05509v3-abstract-full').style.display = 'none'; document.getElementById('2311.05509v3-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, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY-23-179, PSI-PR-23-42 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP05(2024)321 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.19638">arXiv:2310.19638</a> <span> [<a href="https://arxiv.org/pdf/2310.19638">pdf</a>, <a href="https://arxiv.org/format/2310.19638">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/s10052-024-13480-4">10.1140/epjc/s10052-024-13480-4 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Exploring SMEFT Couplings Using the Forward-Backward Asymmetry in Neutral Current Drell-Yan Production at the LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Anataichuk%2C+A">Andrii Anataichuk</a>, <a href="/search/hep-ph?searchtype=author&query=Moch%2C+S">Sven-Olaf Moch</a>, <a href="/search/hep-ph?searchtype=author&query=Abdolmaleki%2C+H">Hamed Abdolmaleki</a>, <a href="/search/hep-ph?searchtype=author&query=Amoroso%2C+S">Simone Amoroso</a>, <a href="/search/hep-ph?searchtype=author&query=Britzger%2C+D">Daniel Britzger</a>, <a href="/search/hep-ph?searchtype=author&query=Dattola%2C+F">Filippo Dattola</a>, <a href="/search/hep-ph?searchtype=author&query=Fiaschi%2C+J">Juri Fiaschi</a>, <a href="/search/hep-ph?searchtype=author&query=Giuli%2C+F">Francesco Giuli</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">Alexander Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Hautmann%2C+F">Francesco Hautmann</a>, <a href="/search/hep-ph?searchtype=author&query=Luszczak%2C+A">Agnieszka Luszczak</a>, <a href="/search/hep-ph?searchtype=author&query=Monfared%2C+S+T">Sara Taheri Monfared</a>, <a href="/search/hep-ph?searchtype=author&query=Olness%2C+F">Fred Olness</a>, <a href="/search/hep-ph?searchtype=author&query=Vazzoler%2C+F">Federico Vazzoler</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">Oleksandr 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="2310.19638v3-abstract-short" style="display: inline;"> Neutral current Drell-Yan (DY) lepton-pair production is considered in the framework of the Standard Model Effective Field Theory (SMEFT). Using the open-source fit platform xFitter, we investigate the impact of high-statistics measurements of the neutral current DY (NCDY) forward-backward asymmetry $A_{\rm{FB}}$ near the weak boson mass scale in the present and forthcoming stages of the Large Had… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.19638v3-abstract-full').style.display = 'inline'; document.getElementById('2310.19638v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.19638v3-abstract-full" style="display: none;"> Neutral current Drell-Yan (DY) lepton-pair production is considered in the framework of the Standard Model Effective Field Theory (SMEFT). Using the open-source fit platform xFitter, we investigate the impact of high-statistics measurements of the neutral current DY (NCDY) forward-backward asymmetry $A_{\rm{FB}}$ near the weak boson mass scale in the present and forthcoming stages of the Large Hadron Collider (LHC). Besides recovering earlier results on the $A_{\rm{FB}}$ sensitivity to parton distribution functions, we analyze the precision determination of $Z$-boson couplings to left-handed and right-handed $u$-quarks and $d$-quarks, and explore Beyond-Standard-Model contributions using the SMEFT framework. We perform a sensitivity study and comment on the role of the $A_{\rm{FB}}$ asymmetry for the electroweak SMEFT fit and precision $Z$-boson physics at the LHC and high-luminosity HL-LHC. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.19638v3-abstract-full').style.display = 'none'; document.getElementById('2310.19638v3-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Published version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY-23-160 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 84 (2024) 1277 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2212.12750">arXiv:2212.12750</a> <span> [<a href="https://arxiv.org/pdf/2212.12750">pdf</a>, <a href="https://arxiv.org/format/2212.12750">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="High Energy Physics - Theory">hep-th</span> </div> </div> <p class="title is-5 mathjax"> Search for effective Lorentz and CPT violation using ZEUS data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=ZEUS+collaboration"> ZEUS collaboration</a>, <a href="/search/hep-ph?searchtype=author&query=Abt%2C+I">I. Abt</a>, <a href="/search/hep-ph?searchtype=author&query=Aggarwal%2C+R">R. Aggarwal</a>, <a href="/search/hep-ph?searchtype=author&query=Aushev%2C+V">V. Aushev</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=Bloch%2C+I">I. Bloch</a>, <a href="/search/hep-ph?searchtype=author&query=Brock%2C+I">I. Brock</a>, <a href="/search/hep-ph?searchtype=author&query=Brook%2C+N+H">N. H. Brook</a>, <a href="/search/hep-ph?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/hep-ph?searchtype=author&query=Bruni%2C+A">A. Bruni</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=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/hep-ph?searchtype=author&query=Catterall%2C+C+D">C. D. Catterall</a>, <a href="/search/hep-ph?searchtype=author&query=Chwastowski%2C+J">J. Chwastowski</a>, <a href="/search/hep-ph?searchtype=author&query=Ciborowski%2C+J">J. Ciborowski</a>, <a href="/search/hep-ph?searchtype=author&query=Ciesielski%2C+R">R. Ciesielski</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=Corradi%2C+M">M. Corradi</a>, <a href="/search/hep-ph?searchtype=author&query=Dementiev%2C+R+K">R. K. Dementiev</a>, <a href="/search/hep-ph?searchtype=author&query=Dusini%2C+S">S. Dusini</a>, <a href="/search/hep-ph?searchtype=author&query=Ferrando%2C+J">J. Ferrando</a>, <a href="/search/hep-ph?searchtype=author&query=Foster%2C+B">B. Foster</a>, <a href="/search/hep-ph?searchtype=author&query=Gallo%2C+E">E. Gallo</a>, <a href="/search/hep-ph?searchtype=author&query=Gangadharan%2C+D">D. Gangadharan</a> , et al. (55 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="2212.12750v1-abstract-short" style="display: inline;"> Lorentz and CPT symmetry in the quark sector of the Standard Model are studied in the context of an effective field theory using ZEUS $e^{\pm} p$ data. Symmetry-violating effects can lead to time-dependent oscillations of otherwise time-independent observables, including scattering cross sections. An analysis using five years of inclusive neutral-current deep inelastic scattering events correspond… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.12750v1-abstract-full').style.display = 'inline'; document.getElementById('2212.12750v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2212.12750v1-abstract-full" style="display: none;"> Lorentz and CPT symmetry in the quark sector of the Standard Model are studied in the context of an effective field theory using ZEUS $e^{\pm} p$ data. Symmetry-violating effects can lead to time-dependent oscillations of otherwise time-independent observables, including scattering cross sections. An analysis using five years of inclusive neutral-current deep inelastic scattering events corresponding to an integrated HERA luminosity of $372\; \text{pb}^{-1}$ at $\sqrt{s} = 318$ Gev has been performed. No evidence for oscillations in sidereal time has been observed within statistical and systematic uncertainties. Constraints, most for the first time, are placed on 42 coefficients parameterising dominant CPT-even dimension-four and CPT-odd dimension-five spin-independent modifications to the propagation and interaction of light quarks. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.12750v1-abstract-full').style.display = 'none'; document.getElementById('2212.12750v1-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 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">36 pages, 12 figures. Additional material included as an ancillary file for this arXiv entry</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY--22--107 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2206.13343">arXiv:2206.13343</a> <span> [<a href="https://arxiv.org/pdf/2206.13343">pdf</a>, <a href="https://arxiv.org/format/2206.13343">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/10.1007/JHEP12(2022)164">10.1007/JHEP12(2022)164 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the cross-section ratio $蟽_{蠄(2S )}/蟽_{J/蠄(1S )}$ in exclusive photoproduction at HERA </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=ZEUS+Collaboration"> ZEUS Collaboration</a>, <a href="/search/hep-ph?searchtype=author&query=Abt%2C+I">I. Abt</a>, <a href="/search/hep-ph?searchtype=author&query=Adamus%2C+M">M. Adamus</a>, <a href="/search/hep-ph?searchtype=author&query=Aggarwal%2C+R">R. Aggarwal</a>, <a href="/search/hep-ph?searchtype=author&query=Aushev%2C+V">V. Aushev</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=Bloch%2C+I">I. Bloch</a>, <a href="/search/hep-ph?searchtype=author&query=Brock%2C+I">I. Brock</a>, <a href="/search/hep-ph?searchtype=author&query=Brook%2C+N+H">N. H. Brook</a>, <a href="/search/hep-ph?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/hep-ph?searchtype=author&query=Bruni%2C+A">A. Bruni</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=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/hep-ph?searchtype=author&query=Catterall%2C+C+D">C. D. Catterall</a>, <a href="/search/hep-ph?searchtype=author&query=Chwastowski%2C+J">J. Chwastowski</a>, <a href="/search/hep-ph?searchtype=author&query=Ciborowski%2C+J">J. Ciborowski</a>, <a href="/search/hep-ph?searchtype=author&query=Ciesielski%2C+R">R. Ciesielski</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=Corradi%2C+M">M. Corradi</a>, <a href="/search/hep-ph?searchtype=author&query=Dementiev%2C+R+K">R. K. Dementiev</a>, <a href="/search/hep-ph?searchtype=author&query=Dusini%2C+S">S. Dusini</a>, <a href="/search/hep-ph?searchtype=author&query=Ferrando%2C+J">J. Ferrando</a>, <a href="/search/hep-ph?searchtype=author&query=Foster%2C+B">B. Foster</a>, <a href="/search/hep-ph?searchtype=author&query=Gallo%2C+E">E. Gallo</a> , et al. (58 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="2206.13343v2-abstract-short" style="display: inline;"> The exclusive photoproduction reactions $纬p \to J/蠄(1S) p$ and $纬p \to 蠄(2S) p$ have been measured at an $ep$ centre-of-mass energy of 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 373 pb$^{-1}$. The measurement was made in the kinematic range $30 < W < 180$ GeV, $Q^2 < 1$ GeV$^2$ and $|t| < 1$ GeV$^2$, where $W$ is the photon--proton centre-of-mass energy, $Q^2$ is the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.13343v2-abstract-full').style.display = 'inline'; document.getElementById('2206.13343v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2206.13343v2-abstract-full" style="display: none;"> The exclusive photoproduction reactions $纬p \to J/蠄(1S) p$ and $纬p \to 蠄(2S) p$ have been measured at an $ep$ centre-of-mass energy of 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 373 pb$^{-1}$. The measurement was made in the kinematic range $30 < W < 180$ GeV, $Q^2 < 1$ GeV$^2$ and $|t| < 1$ GeV$^2$, where $W$ is the photon--proton centre-of-mass energy, $Q^2$ is the photon virtuality and $t$ is the squared four-momentum transfer at the proton vertex. The decay channels used were $J/蠄(1S) \to 渭^+ 渭^-$, $蠄(2S) \to 渭^+ 渭^-$ and $蠄(2S) \to J/蠄(1S) 蟺^+ 蟺^-$ with subsequent decay $J/蠄(1S) \to 渭^+ 渭^-$. The ratio of the production cross sections, $R = 蟽_{蠄(2S)} / 蟽_{J/蠄(1S)}$, has been measured as a function of $W$ and $|t|$ and compared to previous data in photoproduction and deep inelastic scattering and with predictions of QCD-inspired models of exclusive vector-meson production, which are in reasonable agreement with the data. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.13343v2-abstract-full').style.display = 'none'; document.getElementById('2206.13343v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">31 pages, 9 figures. Updated according to comments from journal referee including a new table. Added full collaboration author list</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY-22-107 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2206.12465">arXiv:2206.12465</a> <span> [<a href="https://arxiv.org/pdf/2206.12465">pdf</a>, <a href="https://arxiv.org/format/2206.12465">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: An Open Source QCD Analysis Framework. A resource and reference document for the Snowmass study </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=Abdolmaleki%2C+H">H. Abdolmaleki</a>, <a href="/search/hep-ph?searchtype=author&query=Amoroso%2C+S">S. Amoroso</a>, <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=Fiaschi%2C+J">J. Fiaschi</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=Gwenlan%2C+C">C. Gwenlan</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=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=M%C3%A4kel%C3%A4%2C+T">T. M盲kel盲</a>, <a href="/search/hep-ph?searchtype=author&query=Novikov%2C+I">I. Novikov</a>, <a href="/search/hep-ph?searchtype=author&query=Olness%2C+F">F. Olness</a>, <a href="/search/hep-ph?searchtype=author&query=Sadykov%2C+R">R. Sadykov</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=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="2206.12465v1-abstract-short" style="display: inline;"> We provide an overview of the xFitter open-source software package, review the general capabilities of the program, and highlight applications relevant to the Snowmass study. An updated version of the program (2.2.0) is available on CERN GitLab, a and this has been updated to a C++ codebase with enhanced and extended features. We also discuss some of the ongoing and future code developments that m… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.12465v1-abstract-full').style.display = 'inline'; document.getElementById('2206.12465v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2206.12465v1-abstract-full" style="display: none;"> We provide an overview of the xFitter open-source software package, review the general capabilities of the program, and highlight applications relevant to the Snowmass study. An updated version of the program (2.2.0) is available on CERN GitLab, a and this has been updated to a C++ codebase with enhanced and extended features. We also discuss some of the ongoing and future code developments that may be useful for precision studies. We survey recent analyses performed by the xFitter developers' team including: W and Z production, photon PDFs, Drell-Yan forward-backward asymmetry studies, resummation of small-x contributions, heavy quark production, constraints on the strange PDF, determination of the pion PDF, and determination of the pion Fragmentation Functions. Finally, we briefly summarize selected applications of xFitter in the literature. The xFitter program is a versatile, flexible, modular, and comprehensive tool that can provide impact studies for possible future facilities. We encourage the use of xFitter, and welcome new contributions from the community. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.12465v1-abstract-full').style.display = 'none'; document.getElementById('2206.12465v1-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 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">20 pages, 12 figures. Contribution to the DPF Snowmass Community Planning Exercise</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2112.01120">arXiv:2112.01120</a> <span> [<a href="https://arxiv.org/pdf/2112.01120">pdf</a>, <a href="https://arxiv.org/format/2112.01120">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"> Impact of jet-production data on the next-to-next-to-leading-order determination of HERAPDF2.0 parton distributions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=H1"> H1</a>, <a href="/search/hep-ph?searchtype=author&query=Collaborations%2C+Z">ZEUS Collaborations</a>, <a href="/search/hep-ph?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ph?searchtype=author&query=Abt%2C+I">I. Abt</a>, <a href="/search/hep-ph?searchtype=author&query=Aggarwal%2C+R">R. Aggarwal</a>, <a href="/search/hep-ph?searchtype=author&query=Andreev%2C+V">V. Andreev</a>, <a href="/search/hep-ph?searchtype=author&query=Arratia%2C+M">M. Arratia</a>, <a href="/search/hep-ph?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ph?searchtype=author&query=Baghdasaryan%2C+A">A. Baghdasaryan</a>, <a href="/search/hep-ph?searchtype=author&query=Baty%2C+A">A. Baty</a>, <a href="/search/hep-ph?searchtype=author&query=Begzsuren%2C+K">K. Begzsuren</a>, <a href="/search/hep-ph?searchtype=author&query=Behnke%2C+O">O. Behnke</a>, <a href="/search/hep-ph?searchtype=author&query=Belousov%2C+A">A. Belousov</a>, <a href="/search/hep-ph?searchtype=author&query=Bertolin%2C+A">A. Bertolin</a>, <a href="/search/hep-ph?searchtype=author&query=Bloch%2C+I">I. Bloch</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=Brock%2C+I">I. Brock</a>, <a href="/search/hep-ph?searchtype=author&query=Brook%2C+N+H">N. H. Brook</a>, <a href="/search/hep-ph?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/hep-ph?searchtype=author&query=Bruni%2C+A">A. Bruni</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=Bystritskaya%2C+L">L. Bystritskaya</a>, <a href="/search/hep-ph?searchtype=author&query=Caldwell%2C+A">A. Caldwell</a> , et al. (212 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="2112.01120v1-abstract-short" style="display: inline;"> The HERAPDF2.0 ensemble of parton distribution functions (PDFs) was introduced in 2015. The final stage is presented, a next-to-next-to-leading-order (NNLO) analysis of the HERA data on inclusive deep inelastic $ep$ scattering together with jet data as published by the H1 and ZEUS collaborations. A perturbative QCD fit, simultaneously of $伪_s(M_Z^2)$ and and the PDFs, was performed with the result… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.01120v1-abstract-full').style.display = 'inline'; document.getElementById('2112.01120v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2112.01120v1-abstract-full" style="display: none;"> The HERAPDF2.0 ensemble of parton distribution functions (PDFs) was introduced in 2015. The final stage is presented, a next-to-next-to-leading-order (NNLO) analysis of the HERA data on inclusive deep inelastic $ep$ scattering together with jet data as published by the H1 and ZEUS collaborations. A perturbative QCD fit, simultaneously of $伪_s(M_Z^2)$ and and the PDFs, was performed with the result $伪_s(M_Z^2) = 0.1156 \pm 0.0011~{\rm (exp)}~ ^{+0.0001}_{-0.0002}~ {\rm (model}$ ${\rm +~parameterisation)}~ \pm 0.0029~{\rm (scale)}$. The PDF sets of HERAPDF2.0Jets NNLO were determined with separate fits using two fixed values of $伪_s(M_Z^2)$, $伪_s(M_Z^2)=0.1155$ and $0.118$, since the latter value was already chosen for the published HERAPDF2.0 NNLO analysis based on HERA inclusive DIS data only. The different sets of PDFs are presented, evaluated and compared. The consistency of the PDFs determined with and without the jet data demonstrates the consistency of HERA inclusive and jet-production cross-section data. The inclusion of the jet data reduced the uncertainty on the gluon PDF. Predictions based on the PDFs of HERAPDF2.0Jets NNLO give an excellent description of the jet-production data used as input. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.01120v1-abstract-full').style.display = 'none'; document.getElementById('2112.01120v1-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 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">43 pages, 24 figures, to be submitted to Eur. Phys. J. C</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY-21-206 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.11306">arXiv:2105.11306</a> <span> [<a href="https://arxiv.org/pdf/2105.11306">pdf</a>, <a href="https://arxiv.org/format/2105.11306">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.104.056019">10.1103/PhysRevD.104.056019 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> QCD analysis of pion fragmentation functions in the xFitter framework </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=xFitter+Collaboration"> xFitter Collaboration</a>, <a href="/search/hep-ph?searchtype=author&query=Abdolmaleki%2C+H">Hamed Abdolmaleki</a>, <a href="/search/hep-ph?searchtype=author&query=Soleymaninia%2C+M">Maryam Soleymaninia</a>, <a href="/search/hep-ph?searchtype=author&query=Khanpour%2C+H">Hamzeh Khanpour</a>, <a href="/search/hep-ph?searchtype=author&query=Amoroso%2C+S">Simone Amoroso</a>, <a href="/search/hep-ph?searchtype=author&query=Giuli%2C+F">Francesco Giuli</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">Alexander Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Luszczak%2C+A">Agnieszka Luszczak</a>, <a href="/search/hep-ph?searchtype=author&query=Olness%2C+F">Fredrick Olness</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">Oleksandr 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="2105.11306v1-abstract-short" style="display: inline;"> We present the first open-source analysis of fragmentation functions (FFs) of charged pions (entitled IPM-xFitter) computed at next-to-leading order (NLO) and next-to-next-to-leading order (NNLO) accuracy in perturbative QCD using the xFitter framework. This study incorporates a comprehensive and up-to-date set of pion production data from single-inclusive annihilation (SIA) processes, as well as… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.11306v1-abstract-full').style.display = 'inline'; document.getElementById('2105.11306v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.11306v1-abstract-full" style="display: none;"> We present the first open-source analysis of fragmentation functions (FFs) of charged pions (entitled IPM-xFitter) computed at next-to-leading order (NLO) and next-to-next-to-leading order (NNLO) accuracy in perturbative QCD using the xFitter framework. This study incorporates a comprehensive and up-to-date set of pion production data from single-inclusive annihilation (SIA) processes, as well as the most recent measurements of inclusive cross-sections of single pion by the BELLE collaboration. The determination of pion FFs along with their theoretical uncertainties is performed in the Zero-Mass Variable-Flavor Number Scheme (ZM-VFNS). We also present comparisons of our FFs set with recent fits from the literature. The resulting NLO and NNLO pion FFs provide valuable insights for applications in present and future high-energy analysis of pion final state processes. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.11306v1-abstract-full').style.display = 'none'; document.getElementById('2105.11306v1-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, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">20 pages, 10 figures, 2 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 104, 056019 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2012.10298">arXiv:2012.10298</a> <span> [<a href="https://arxiv.org/pdf/2012.10298">pdf</a>, <a href="https://arxiv.org/format/2012.10298">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.2021.136613">10.1016/j.physletb.2021.136613 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Longitudinal Z-Boson Polarization and the Higgs Boson Production Cross Section at the Large Hadron Collider </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Amoroso%2C+S">S. Amoroso</a>, <a href="/search/hep-ph?searchtype=author&query=Fiaschi%2C+J">J. Fiaschi</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=Hautmann%2C+F">F. Hautmann</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="2012.10298v2-abstract-short" style="display: inline;"> Charged lepton pairs are produced copiously in high-energy hadron collisions via electroweak gauge boson exchange, and are one of the most precisely measured final states in proton-proton collisions at the Large Hadron Collider (LHC). We propose that measurements of lepton angular distributions can be used to improve the accuracy of theoretical predictions for Higgs boson production cross sections… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.10298v2-abstract-full').style.display = 'inline'; document.getElementById('2012.10298v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.10298v2-abstract-full" style="display: none;"> Charged lepton pairs are produced copiously in high-energy hadron collisions via electroweak gauge boson exchange, and are one of the most precisely measured final states in proton-proton collisions at the Large Hadron Collider (LHC). We propose that measurements of lepton angular distributions can be used to improve the accuracy of theoretical predictions for Higgs boson production cross sections at the LHC. To this end, we exploit the sensitivity of the lepton angular coefficient associated with the longitudinal Z-boson polarization to the parton density function (PDF) for gluons resolved from the incoming protons, in order to constrain the Higgs boson cross section from gluon fusion processes. By a detailed numerical analysis using the open-source platform xFitter, we find that high-statistics determinations of the longitudinally polarized angular coefficient at the LHC Run III and high-luminosity HL-LHC improve the PDF systematic uncertainties of the Higgs boson cross section predictions by 50% over a broad range of Higgs boson rapidities. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.10298v2-abstract-full').style.display = 'none'; document.getElementById('2012.10298v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">Latex, 7 pages. Version v2: comments, references and figure added, typos corrected, results unchanged</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2009.07763">arXiv:2009.07763</a> <span> [<a href="https://arxiv.org/pdf/2009.07763">pdf</a>, <a href="https://arxiv.org/format/2009.07763">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/10.1007/JHEP04(2021)043">10.1007/JHEP04(2021)043 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Heavy-flavor hadro-production with heavy-quark masses renormalized in the ${\overline{\rm MS}}$, MSR and on-shell schemes </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Garzelli%2C+M+V">M. V. Garzelli</a>, <a href="/search/hep-ph?searchtype=author&query=Kemmler%2C+L">L. Kemmler</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> </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="2009.07763v2-abstract-short" style="display: inline;"> We present predictions for heavy-quark production at the Large Hadron Collider making use of the ${\overline{\rm MS}}$ and MSR renormalization schemes for the heavy-quark mass as alternatives to the widely used on-shell renormalization scheme. We compute single and double differential distributions including QCD corrections at next-to-leading order and investigate the renormalization and factoriza… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.07763v2-abstract-full').style.display = 'inline'; document.getElementById('2009.07763v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2009.07763v2-abstract-full" style="display: none;"> We present predictions for heavy-quark production at the Large Hadron Collider making use of the ${\overline{\rm MS}}$ and MSR renormalization schemes for the heavy-quark mass as alternatives to the widely used on-shell renormalization scheme. We compute single and double differential distributions including QCD corrections at next-to-leading order and investigate the renormalization and factorization scale dependence as well as the perturbative convergence in these mass renormalization schemes. The implementation is based on publicly available programs, ${\texttt{MCFM}}$ and ${\texttt{xFitter}}$, extending their capabilities. Our results are applied to extract the top-quark mass using measurements of the total and differential $t\bar{t}$ production cross-sections and to investigate constraints on parton distribution functions, especially on the gluon distribution at low $x$ values, from available LHC data on heavy-flavor hadro-production. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.07763v2-abstract-full').style.display = 'none'; document.getElementById('2009.07763v2-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 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">52 pages, 21 figures, 5 tables; v2: published version, extended with respect to v1 to account for all referee comments</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 20-151 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 2104 (2021) 043 </p> </li> <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/2007.12096">arXiv:2007.12096</a> <span> [<a href="https://arxiv.org/pdf/2007.12096">pdf</a>, <a href="https://arxiv.org/format/2007.12096">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/10.1103/PhysRevD.102.071101">10.1103/PhysRevD.102.071101 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First branching fraction measurement of the suppressed decay $螢_c^0\to 蟺^-螞_c^+$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=LHCb+collaboration"> LHCb collaboration</a>, <a href="/search/hep-ph?searchtype=author&query=Aaij%2C+R">R. Aaij</a>, <a href="/search/hep-ph?searchtype=author&query=Beteta%2C+C+A">C. Abell谩n Beteta</a>, <a href="/search/hep-ph?searchtype=author&query=Ackernley%2C+T">T. Ackernley</a>, <a href="/search/hep-ph?searchtype=author&query=Adeva%2C+B">B. Adeva</a>, <a href="/search/hep-ph?searchtype=author&query=Adinolfi%2C+M">M. Adinolfi</a>, <a href="/search/hep-ph?searchtype=author&query=Afsharnia%2C+H">H. Afsharnia</a>, <a href="/search/hep-ph?searchtype=author&query=Aidala%2C+C+A">C. A. Aidala</a>, <a href="/search/hep-ph?searchtype=author&query=Aiola%2C+S">S. Aiola</a>, <a href="/search/hep-ph?searchtype=author&query=Ajaltouni%2C+Z">Z. Ajaltouni</a>, <a href="/search/hep-ph?searchtype=author&query=Akar%2C+S">S. Akar</a>, <a href="/search/hep-ph?searchtype=author&query=Albrecht%2C+J">J. Albrecht</a>, <a href="/search/hep-ph?searchtype=author&query=Alessio%2C+F">F. Alessio</a>, <a href="/search/hep-ph?searchtype=author&query=Alexander%2C+M">M. Alexander</a>, <a href="/search/hep-ph?searchtype=author&query=Albero%2C+A+A">A. Alfonso Albero</a>, <a href="/search/hep-ph?searchtype=author&query=Aliouche%2C+Z">Z. Aliouche</a>, <a href="/search/hep-ph?searchtype=author&query=Alkhazov%2C+G">G. Alkhazov</a>, <a href="/search/hep-ph?searchtype=author&query=Cartelle%2C+P+A">P. Alvarez Cartelle</a>, <a href="/search/hep-ph?searchtype=author&query=Amato%2C+S">S. Amato</a>, <a href="/search/hep-ph?searchtype=author&query=Amhis%2C+Y">Y. Amhis</a>, <a href="/search/hep-ph?searchtype=author&query=An%2C+L">L. An</a>, <a href="/search/hep-ph?searchtype=author&query=Anderlini%2C+L">L. Anderlini</a>, <a href="/search/hep-ph?searchtype=author&query=Andreassi%2C+G">G. Andreassi</a>, <a href="/search/hep-ph?searchtype=author&query=Andreianov%2C+A">A. Andreianov</a>, <a href="/search/hep-ph?searchtype=author&query=Andreotti%2C+M">M. Andreotti</a> , et al. (948 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="2007.12096v2-abstract-short" style="display: inline;"> The $螢_c^0$ baryon is unstable and usually decays into charmless final states by the $c \to s u\overline{d}$ transition. It can, however, also disintegrate into a $蟺^-$ meson and a $螞_c^+$ baryon via $s$ quark decay or via $cs\to d c$ weak scattering. The interplay between the latter two processes governs the size of the branching fraction ${\cal{B}}$$(螢_c^0\to 蟺^-螞_c^+)$, first measured here to b… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.12096v2-abstract-full').style.display = 'inline'; document.getElementById('2007.12096v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.12096v2-abstract-full" style="display: none;"> The $螢_c^0$ baryon is unstable and usually decays into charmless final states by the $c \to s u\overline{d}$ transition. It can, however, also disintegrate into a $蟺^-$ meson and a $螞_c^+$ baryon via $s$ quark decay or via $cs\to d c$ weak scattering. The interplay between the latter two processes governs the size of the branching fraction ${\cal{B}}$$(螢_c^0\to 蟺^-螞_c^+)$, first measured here to be $(0.55\pm 0.02 \pm 0.18)$%, where the first uncertainty is statistical and second systematic. This result is compatible with the larger of the theoretical predictions that connect models of hyperon decays using partially conserved axial currents and SU(3) symmetry with those involving the heavy-quark expansion and heavy-quark symmetry. In addition, the branching fraction of the normalization channel, ${\cal{B}}(螢_c^+\to p K^- 蟺^+) = (1.135 \pm 0.002 \pm 0.387)$% is measured. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.12096v2-abstract-full').style.display = 'none'; document.getElementById('2007.12096v2-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 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 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">Sixteen pages and three figures. All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2020-016.html (LHCb public pages)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-EP-2020-129, LHCb-PAPER-2020-016 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 102, 071101 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2002.02902">arXiv:2002.02902</a> <span> [<a href="https://arxiv.org/pdf/2002.02902">pdf</a>, <a href="https://arxiv.org/format/2002.02902">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.102.014040">10.1103/PhysRevD.102.014040 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Parton Distribution Functions of the Charged Pion Within The xFitter Framework </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Novikov%2C+I">Ivan Novikov</a>, <a href="/search/hep-ph?searchtype=author&query=Abdolmaleki%2C+H">Hamed Abdolmaleki</a>, <a href="/search/hep-ph?searchtype=author&query=Britzger%2C+D">Daniel Britzger</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=Giuli%2C+F">Francesco Giuli</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">Alexander Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Kusina%2C+A">Aleksander Kusina</a>, <a href="/search/hep-ph?searchtype=author&query=Luszczak%2C+A">Agnieszka Luszczak</a>, <a href="/search/hep-ph?searchtype=author&query=Olness%2C+F">Fred Olness</a>, <a href="/search/hep-ph?searchtype=author&query=Starovoitov%2C+P">Pavel Starovoitov</a>, <a href="/search/hep-ph?searchtype=author&query=Sutton%2C+M">Mark Sutton</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">Oleksandr 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="2002.02902v2-abstract-short" style="display: inline;"> We present the first open-source analysis of parton distribution functions (PDFs) of charged pions using xFitter, an open-source QCD fit framework to facilitate PDF extraction and analyses. Our calculations are implemented at next-to-leading order (NLO) using APPLgrids generated by MCFM generator. Using currently available Drell-Yan and photon production data, we find the valence distribution is w… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.02902v2-abstract-full').style.display = 'inline'; document.getElementById('2002.02902v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2002.02902v2-abstract-full" style="display: none;"> We present the first open-source analysis of parton distribution functions (PDFs) of charged pions using xFitter, an open-source QCD fit framework to facilitate PDF extraction and analyses. Our calculations are implemented at next-to-leading order (NLO) using APPLgrids generated by MCFM generator. Using currently available Drell-Yan and photon production data, we find the valence distribution is well constrained; however, the considered data are not sensitive enough to unambiguously determine sea and gluon distributions. Fractions of momentum carried by the valence, sea and gluon components are discussed, and we compare with the results of JAM collaboration and the GRV group. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.02902v2-abstract-full').style.display = 'none'; document.getElementById('2002.02902v2-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 August, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 February, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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">9 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 20-013 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 102, 014040 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1911.13164">arXiv:1911.13164</a> <span> [<a href="https://arxiv.org/pdf/1911.13164">pdf</a>, <a href="https://arxiv.org/format/1911.13164">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/JHEP04(2020)118">10.1007/JHEP04(2020)118 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Improved constraints on parton distributions using LHCb, ALICE and HERA heavy-flavour measurements and implications for the predictions for prompt atmospheric-neutrino fluxes </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">O. Zenaiev</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=Moch%2C+S+-">S. -O. Moch</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=Olness%2C+F">F. Olness</a>, <a href="/search/hep-ph?searchtype=author&query=Geiser%2C+A">A. Geiser</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="1911.13164v2-abstract-short" style="display: inline;"> The impact of measurements of heavy-flavour production in deep inelastic $ep$ scattering and in $pp$ collisions on parton distribution functions is studied in a QCD analysis at next-to-leading order. Recent combined results of inclusive and heavy-flavour production cross sections in deep inelastic scattering at HERA are investigated together with heavy-flavour production measurements at the LHC. D… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.13164v2-abstract-full').style.display = 'inline'; document.getElementById('1911.13164v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1911.13164v2-abstract-full" style="display: none;"> The impact of measurements of heavy-flavour production in deep inelastic $ep$ scattering and in $pp$ collisions on parton distribution functions is studied in a QCD analysis at next-to-leading order. Recent combined results of inclusive and heavy-flavour production cross sections in deep inelastic scattering at HERA are investigated together with heavy-flavour production measurements at the LHC. Differential cross sections of charm- and beauty-hadron production measured by the LHCb collaboration at the centre-of-mass energies of 5, 7 and 13 TeV as well as the recent measurements of the ALICE experiment at the centre-of-mass energies of 5 and 7 TeV are explored. These data impose additional constraints on the gluon and the sea-quark distributions at low partonic fractions $x$ of the proton momentum, down to $x\approx10^{-6}$. The impact of the resulting parton distribution function in the predictions for the prompt atmospheric-neutrino fluxes is studied. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.13164v2-abstract-full').style.display = 'none'; document.getElementById('1911.13164v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY 19-211 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 2004 (2020) 118 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1909.00451">arXiv:1909.00451</a> <span> [<a href="https://arxiv.org/pdf/1909.00451">pdf</a>, <a href="https://arxiv.org/format/1909.00451">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"> Recent QCD results from the xFitter project: Probing the strange content of the proton with charm production in charged current at LHeC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=xFitter+Developers+Team"> xFitter Developers Team</a>, <a href="/search/hep-ph?searchtype=author&query=Abdolmaleki%2C+H">Hamed Abdolmaleki</a>, <a href="/search/hep-ph?searchtype=author&query=Bertone%2C+V">Valerio Bertone</a>, <a href="/search/hep-ph?searchtype=author&query=Britzger%2C+D">Daniel Britzger</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=Geiser%2C+A">Achim Geiser</a>, <a href="/search/hep-ph?searchtype=author&query=Giuli%2C+F">Francesco Giuli</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">Alexander Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Luszczak%2C+A">Agnieszka Luszczak</a>, <a href="/search/hep-ph?searchtype=author&query=Novikov%2C+I">Ivan Novikov</a>, <a href="/search/hep-ph?searchtype=author&query=Olness%2C+F">Fred Olness</a>, <a href="/search/hep-ph?searchtype=author&query=Sapronov%2C+A">Andrey Sapronov</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">Oleksandr 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="1909.00451v1-abstract-short" style="display: inline;"> We investigate charm production in charged-current deep-inelastic scattering (DIS) using the xFitter program. xFitter is an open-source software framework for the determination of PDFs and the analysis of QCD physics, and has been used for a variety of LHC studies. The study of charged current DIS charm production provides an important perspective on the strange quark PDF, s(x). We make use of the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.00451v1-abstract-full').style.display = 'inline'; document.getElementById('1909.00451v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1909.00451v1-abstract-full" style="display: none;"> We investigate charm production in charged-current deep-inelastic scattering (DIS) using the xFitter program. xFitter is an open-source software framework for the determination of PDFs and the analysis of QCD physics, and has been used for a variety of LHC studies. The study of charged current DIS charm production provides an important perspective on the strange quark PDF, s(x). We make use of the xFitter tools to study the present s(x) constraints, and then use LHeC pseudodata to infer how these might improve. Furthermore, as xFitter implements both Fixed Flavor and Variable Flavor number schemes, we can examine the impact of these different theoretical choices; this highlights some interesting aspects of multi-scale calculations. This study provides a practical illustration of the many features of xFitter. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.00451v1-abstract-full').style.display = 'none'; document.getElementById('1909.00451v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 September, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 3 figures. DIS2019 Workshop, Torino, Italy [Conf. report of arXiv:1907.01014]</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1907.08301">arXiv:1907.08301</a> <span> [<a href="https://arxiv.org/pdf/1907.08301">pdf</a>, <a href="https://arxiv.org/ps/1907.08301">ps</a>, <a href="https://arxiv.org/format/1907.08301">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"> Forward-Backward Drell-Yan Asymmetry and PDF Determination </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Abdolmaleki%2C+H">H Abdolmaleki</a>, <a href="/search/hep-ph?searchtype=author&query=Accomando%2C+E">E Accomando</a>, <a href="/search/hep-ph?searchtype=author&query=Bertone%2C+V">V Bertone</a>, <a href="/search/hep-ph?searchtype=author&query=Fiaschi%2C+J">J Fiaschi</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=Hautmann%2C+F">F Hautmann</a>, <a href="/search/hep-ph?searchtype=author&query=Luszczak%2C+A">A Luszczak</a>, <a href="/search/hep-ph?searchtype=author&query=Moretti%2C+S">S Moretti</a>, <a href="/search/hep-ph?searchtype=author&query=Novikov%2C+I">I Novikov</a>, <a href="/search/hep-ph?searchtype=author&query=Olness%2C+F">F Olness</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="1907.08301v1-abstract-short" style="display: inline;"> We investigate the impact of high-statistics Drell-Yan (DY) measurements at the LHC on the study of non-perturbative QCD effects from parton distribution functions (PDF). We present the results of a PDF profiling analysis based on the neutral-current DY forward-backward asymmetry, using the open source fit platform xFitter. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1907.08301v1-abstract-full" style="display: none;"> We investigate the impact of high-statistics Drell-Yan (DY) measurements at the LHC on the study of non-perturbative QCD effects from parton distribution functions (PDF). We present the results of a PDF profiling analysis based on the neutral-current DY forward-backward asymmetry, using the open source fit platform xFitter. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.08301v1-abstract-full').style.display = 'none'; document.getElementById('1907.08301v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 2 figures. Contributed at 54th Rencontres de Moriond, La Thuile, March 2019</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1907.07727">arXiv:1907.07727</a> <span> [<a href="https://arxiv.org/pdf/1907.07727">pdf</a>, <a href="https://arxiv.org/format/1907.07727">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/JHEP10(2019)176">10.1007/JHEP10(2019)176 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> PDF Profiling Using the Forward-Backward Asymmetry in Neutral Current Drell-Yan Production </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Accomando%2C+E">Elena Accomando</a>, <a href="/search/hep-ph?searchtype=author&query=Fiaschi%2C+J">Juri Fiaschi</a>, <a href="/search/hep-ph?searchtype=author&query=Hautmann%2C+F">Francesco Hautmann</a>, <a href="/search/hep-ph?searchtype=author&query=Moretti%2C+S">Stefano Moretti</a>, <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=Abdolmaleki%2C+H">Hamed Abdolmaleki</a>, <a href="/search/hep-ph?searchtype=author&query=Bertone%2C+V">Valerio Bertone</a>, <a href="/search/hep-ph?searchtype=author&query=Giuli%2C+F">Francesco Giuli</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">Alexander Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Luszczak%2C+A">Agnieszka Luszczak</a>, <a href="/search/hep-ph?searchtype=author&query=Novikov%2C+I">Ivan Novikov</a>, <a href="/search/hep-ph?searchtype=author&query=Olness%2C+F">Fred Olness</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">Oleksandr 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="1907.07727v2-abstract-short" style="display: inline;"> Non-perturbative QCD effects from Parton Distribution Functions (PDFs) may be constrained by using high-statistics Large Hadron Collider (LHC) data. Drell-Yan (DY) measurements in the Charged Current (CC) case provide one of the primary means to do this, in the form of the lepton charge asymmetry. We investigate here the impact of measurements in Neutral Current (NC) DY data mapped onto the Forwar… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.07727v2-abstract-full').style.display = 'inline'; document.getElementById('1907.07727v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1907.07727v2-abstract-full" style="display: none;"> Non-perturbative QCD effects from Parton Distribution Functions (PDFs) may be constrained by using high-statistics Large Hadron Collider (LHC) data. Drell-Yan (DY) measurements in the Charged Current (CC) case provide one of the primary means to do this, in the form of the lepton charge asymmetry. We investigate here the impact of measurements in Neutral Current (NC) DY data mapped onto the Forward-Backward Asymmetry ($A_{\rm FB}$) on PDF determinations, by using the open source fit platform {\tt{xFitter}}. We demonstrate the potential impact of $A_{\rm FB}$ data on PDF determinations and perform a thorough analysis of related uncertainties. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.07727v2-abstract-full').style.display = 'none'; document.getElementById('1907.07727v2-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 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 10 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY-19-127, MS-TP-19-19, CERN-TH-2019-110 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1907.01014">arXiv:1907.01014</a> <span> [<a href="https://arxiv.org/pdf/1907.01014">pdf</a>, <a href="https://arxiv.org/format/1907.01014">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"> Probing the strange content of the proton with charm production in charged current at LHeC </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=Abdolmaleki%2C+H">Hamed Abdolmaleki</a>, <a href="/search/hep-ph?searchtype=author&query=Bertone%2C+V">Valerio Bertone</a>, <a href="/search/hep-ph?searchtype=author&query=Britzger%2C+D">Daniel Britzger</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=Geiser%2C+A">Achim Geiser</a>, <a href="/search/hep-ph?searchtype=author&query=Giuli%2C+F">Francesco Giuli</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">Alexander Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Luszczak%2C+A">Agnieszka Luszczak</a>, <a href="/search/hep-ph?searchtype=author&query=Novikov%2C+I">Ivan Novikov</a>, <a href="/search/hep-ph?searchtype=author&query=Olness%2C+F">Fred Olness</a>, <a href="/search/hep-ph?searchtype=author&query=Sapronov%2C+A">Andrey Sapronov</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">Oleksandr 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="1907.01014v2-abstract-short" style="display: inline;"> We study charm production in charged-current deep-inelastic scattering (DIS) using the xFitter framework. Recent results from the LHC have focused renewed attention on the determination of the strange-quark parton distribution function (PDF) and the DIS charm process provides important complementary constraints on this quantity. We examine the current PDF uncertainty, and use LHeC pseudodata to es… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.01014v2-abstract-full').style.display = 'inline'; document.getElementById('1907.01014v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1907.01014v2-abstract-full" style="display: none;"> We study charm production in charged-current deep-inelastic scattering (DIS) using the xFitter framework. Recent results from the LHC have focused renewed attention on the determination of the strange-quark parton distribution function (PDF) and the DIS charm process provides important complementary constraints on this quantity. We examine the current PDF uncertainty, and use LHeC pseudodata to estimate the potential improvement from this proposed facility. As xFitter implements both fixed-flavor- and variable-flavor-number schemes, we can compare the impact of these different theoretical choices; this highlights some interesting aspects of multi-scale calculations. We find that the high-statistics LHeC data covering a wide kinematic range could substantially reduce the strange PDF uncertainty. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.01014v2-abstract-full').style.display = 'none'; document.getElementById('1907.01014v2-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 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">21 pages, 19 figures. Version 2: update to EPJC version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY Report 19-107 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1902.04070">arXiv:1902.04070</a> <span> [<a href="https://arxiv.org/pdf/1902.04070">pdf</a>, <a href="https://arxiv.org/format/1902.04070">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"> Standard Model Physics at the HL-LHC and HE-LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Azzi%2C+P">P. Azzi</a>, <a href="/search/hep-ph?searchtype=author&query=Farry%2C+S">S. Farry</a>, <a href="/search/hep-ph?searchtype=author&query=Nason%2C+P">P. Nason</a>, <a href="/search/hep-ph?searchtype=author&query=Tricoli%2C+A">A. Tricoli</a>, <a href="/search/hep-ph?searchtype=author&query=Zeppenfeld%2C+D">D. Zeppenfeld</a>, <a href="/search/hep-ph?searchtype=author&query=Khalek%2C+R+A">R. Abdul Khalek</a>, <a href="/search/hep-ph?searchtype=author&query=Alimena%2C+J">J. Alimena</a>, <a href="/search/hep-ph?searchtype=author&query=Andari%2C+N">N. Andari</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=Armbruster%2C+A+J">A. J. Armbruster</a>, <a href="/search/hep-ph?searchtype=author&query=Baglio%2C+J">J. Baglio</a>, <a href="/search/hep-ph?searchtype=author&query=Bailey%2C+S">S. Bailey</a>, <a href="/search/hep-ph?searchtype=author&query=Bakos%2C+E">E. Bakos</a>, <a href="/search/hep-ph?searchtype=author&query=Bakshi%2C+A">A. Bakshi</a>, <a href="/search/hep-ph?searchtype=author&query=Baldenegro%2C+C">C. Baldenegro</a>, <a href="/search/hep-ph?searchtype=author&query=Balli%2C+F">F. Balli</a>, <a href="/search/hep-ph?searchtype=author&query=Barker%2C+A">A. Barker</a>, <a href="/search/hep-ph?searchtype=author&query=Barter%2C+W">W. Barter</a>, <a href="/search/hep-ph?searchtype=author&query=de+Blas%2C+J">J. de Blas</a>, <a href="/search/hep-ph?searchtype=author&query=Blekman%2C+F">F. Blekman</a>, <a href="/search/hep-ph?searchtype=author&query=Bloch%2C+D">D. Bloch</a>, <a href="/search/hep-ph?searchtype=author&query=Bodek%2C+A">A. Bodek</a>, <a href="/search/hep-ph?searchtype=author&query=Boonekamp%2C+M">M. Boonekamp</a>, <a href="/search/hep-ph?searchtype=author&query=Boos%2C+E">E. Boos</a>, <a href="/search/hep-ph?searchtype=author&query=Sola%2C+J+D+B">J. D. Bossio Sola</a> , et al. (201 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="1902.04070v3-abstract-short" style="display: inline;"> The successful operation of the Large Hadron Collider (LHC) and the excellent performance of the ATLAS, CMS, LHCb and ALICE detectors in Run-1 and Run-2 with $pp$ collisions at center-of-mass energies of 7, 8 and 13 TeV as well as the giant leap in precision calculations and modeling of fundamental interactions at hadron colliders have allowed an extraordinary breadth of physics studies including… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1902.04070v3-abstract-full').style.display = 'inline'; document.getElementById('1902.04070v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1902.04070v3-abstract-full" style="display: none;"> The successful operation of the Large Hadron Collider (LHC) and the excellent performance of the ATLAS, CMS, LHCb and ALICE detectors in Run-1 and Run-2 with $pp$ collisions at center-of-mass energies of 7, 8 and 13 TeV as well as the giant leap in precision calculations and modeling of fundamental interactions at hadron colliders have allowed an extraordinary breadth of physics studies including precision measurements of a variety physics processes. The LHC results have so far confirmed the validity of the Standard Model of particle physics up to unprecedented energy scales and with great precision in the sectors of strong and electroweak interactions as well as flavour physics, for instance in top quark physics. The upgrade of the LHC to a High Luminosity phase (HL-LHC) at 14 TeV center-of-mass energy with 3 ab$^{-1}$ of integrated luminosity will probe the Standard Model with even greater precision and will extend the sensitivity to possible anomalies in the Standard Model, thanks to a ten-fold larger data set, upgraded detectors and expected improvements in the theoretical understanding. This document summarises the physics reach of the HL-LHC in the realm of strong and electroweak interactions and top quark physics, and provides a glimpse of the potential of a possible further upgrade of the LHC to a 27 TeV $pp$ collider, the High-Energy LHC (HE-LHC), assumed to accumulate an integrated luminosity of 15 ab$^{-1}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1902.04070v3-abstract-full').style.display = 'none'; document.getElementById('1902.04070v3-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 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 February, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Report from Working Group 1 on the Physics of the HL-LHC, and Perspectives at the HE-LHC</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> CERN-LPCC-2018-03 </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/1802.00064">arXiv:1802.00064</a> <span> [<a href="https://arxiv.org/pdf/1802.00064">pdf</a>, <a href="https://arxiv.org/format/1802.00064">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"> Impact of low-$x$ resummation on QCD analysis of HERA data </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=Abdolmaleki%2C+H">Hamed Abdolmaleki</a>, <a href="/search/hep-ph?searchtype=author&query=Bertone%2C+V">Valerio Bertone</a>, <a href="/search/hep-ph?searchtype=author&query=Britzger%2C+D">Daniel Britzger</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=Giuli%2C+F">Francesco Giuli</a>, <a href="/search/hep-ph?searchtype=author&query=Glazov%2C+A">Alexander Glazov</a>, <a href="/search/hep-ph?searchtype=author&query=Kusina%2C+A">Aleksander Kusina</a>, <a href="/search/hep-ph?searchtype=author&query=Luszczak%2C+A">Agnieszka Luszczak</a>, <a href="/search/hep-ph?searchtype=author&query=Olness%2C+F">Fred Olness</a>, <a href="/search/hep-ph?searchtype=author&query=Sapronov%2C+A">Andrey Sapronov</a>, <a href="/search/hep-ph?searchtype=author&query=Shvydkin%2C+P">Pavel Shvydkin</a>, <a href="/search/hep-ph?searchtype=author&query=Wichmann%2C+K">Katarzyna Wichmann</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">Oleksandr Zenaiev</a>, <a href="/search/hep-ph?searchtype=author&query=Bonvini%2C+M">Marco Bonvini</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="1802.00064v2-abstract-short" style="display: inline;"> Fits to the final combined HERA deep-inelastic scattering cross-section data within the conventional DGLAP framework of QCD have shown some tension at low $x$ and low $Q^2$. A resolution of this tension incorporating $\ln(1/x)$-resummation terms into the HERAPDF fits is investigated using the xFitter program. The kinematic region where this resummation is important is delineated. Such high-energy… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.00064v2-abstract-full').style.display = 'inline'; document.getElementById('1802.00064v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.00064v2-abstract-full" style="display: none;"> Fits to the final combined HERA deep-inelastic scattering cross-section data within the conventional DGLAP framework of QCD have shown some tension at low $x$ and low $Q^2$. A resolution of this tension incorporating $\ln(1/x)$-resummation terms into the HERAPDF fits is investigated using the xFitter program. The kinematic region where this resummation is important is delineated. Such high-energy resummation not only gives a better description of the data, particularly of the longitudinal structure function $F_L$, it also results in a gluon PDF which is steeply rising at low $x$ for low scales, $Q^2 \simeq 2.5$ GeV$^2$, contrary to the fixed-order NLO and NNLO gluon PDF. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.00064v2-abstract-full').style.display = 'none'; document.getElementById('1802.00064v2-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 July, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 January, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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">14 pages, 12 figures. Additional studies and various improvements. EPJC 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/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/1612.02371">arXiv:1612.02371</a> <span> [<a href="https://arxiv.org/pdf/1612.02371">pdf</a>, <a href="https://arxiv.org/format/1612.02371">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/10.1140/epjc/s10052-017-4620-4">10.1140/epjc/s10052-017-4620-4 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Charm Production and QCD Analysis at HERA and LHC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">Oleksandr 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="1612.02371v2-abstract-short" style="display: inline;"> This review is devoted to the study of charm production in ep and pp collisions. The total set of measurements obtained by the two collaborations H1 and ZEUS from HERA and their combination is outlined, as well as complementary data obtained by the LHCb collaboration at the LHC. After fitting the parton distribution functions the charm production cross sections are predicted within perturbative QC… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1612.02371v2-abstract-full').style.display = 'inline'; document.getElementById('1612.02371v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1612.02371v2-abstract-full" style="display: none;"> This review is devoted to the study of charm production in ep and pp collisions. The total set of measurements obtained by the two collaborations H1 and ZEUS from HERA and their combination is outlined, as well as complementary data obtained by the LHCb collaboration at the LHC. After fitting the parton distribution functions the charm production cross sections are predicted within perturbative QCD at next-to-leading order using the fixed-flavour-number scheme. Agreement with the data is found. The combined HERA charm data are sensitive to the $c$-quark mass and enabled its accurate determination. The predictions crucially depend upon the knowledge of the gluon distribution function. It is shown that the shape of the gluon distribution based on the HERA data is considerably improved by adding the measurements from LHCb and applicable down to values x of about 10^{-6}, where x is the proton momentum fraction carried by a parton. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1612.02371v2-abstract-full').style.display = 'none'; document.getElementById('1612.02371v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 March, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 December, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">105 pages, 108 figures, 22 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-17-025 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 77 (2017) 151 </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/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/1604.02220">arXiv:1604.02220</a> <span> [<a href="https://arxiv.org/pdf/1604.02220">pdf</a>, <a href="https://arxiv.org/ps/1604.02220">ps</a>, <a href="https://arxiv.org/format/1604.02220">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/10.1016/j.physletb.2016.06.001">10.1016/j.physletb.2016.06.001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for a narrow baryonic state decaying to ${pK^0_S}$ and ${\bar{p}K^0_S}$ in deep inelastic scattering at HERA </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=ZEUS+Collaboration"> ZEUS Collaboration</a>, <a href="/search/hep-ph?searchtype=author&query=Abramowicz%2C+H">H. Abramowicz</a>, <a href="/search/hep-ph?searchtype=author&query=Abt%2C+I">I. Abt</a>, <a href="/search/hep-ph?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/hep-ph?searchtype=author&query=Adamus%2C+M">M. Adamus</a>, <a href="/search/hep-ph?searchtype=author&query=Antonelli%2C+S">S. Antonelli</a>, <a href="/search/hep-ph?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ph?searchtype=author&query=Behnke%2C+O">O. Behnke</a>, <a href="/search/hep-ph?searchtype=author&query=Behrens%2C+U">U. Behrens</a>, <a href="/search/hep-ph?searchtype=author&query=Bertolin%2C+A">A. Bertolin</a>, <a href="/search/hep-ph?searchtype=author&query=Bhadra%2C+S">S. Bhadra</a>, <a href="/search/hep-ph?searchtype=author&query=Bloch%2C+I">I. Bloch</a>, <a href="/search/hep-ph?searchtype=author&query=Boos%2C+E+G">E. G. Boos</a>, <a href="/search/hep-ph?searchtype=author&query=Brock%2C+I">I. Brock</a>, <a href="/search/hep-ph?searchtype=author&query=Brook%2C+N+H">N. H. Brook</a>, <a href="/search/hep-ph?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/hep-ph?searchtype=author&query=Bruni%2C+A">A. Bruni</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=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/hep-ph?searchtype=author&query=Capua%2C+M">M. Capua</a>, <a href="/search/hep-ph?searchtype=author&query=Catterall%2C+C+D">C. D. Catterall</a>, <a href="/search/hep-ph?searchtype=author&query=Chwastowski%2C+J">J. Chwastowski</a>, <a href="/search/hep-ph?searchtype=author&query=Ciborowski%2C+J">J. Ciborowski</a>, <a href="/search/hep-ph?searchtype=author&query=Ciesielski%2C+R">R. Ciesielski</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A+M">A. M. Cooper-Sarkar</a> , et al. (102 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="1604.02220v2-abstract-short" style="display: inline;"> A search for a narrow baryonic state in the $pK^0_S$ and $\bar{p}K^0_S$ system has been performed in $ep$ collisions at HERA with the ZEUS detector using an integrated luminosity of 358 pb$^{-1}$ taken in 2003-2007. The search was performed with deep inelastic scattering events at an $ep$ centre-of-mass energy of 318 GeV for exchanged photon virtuality, $Q^2$, between 20 and 100 $\rm{} GeV^{2}$. C… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1604.02220v2-abstract-full').style.display = 'inline'; document.getElementById('1604.02220v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1604.02220v2-abstract-full" style="display: none;"> A search for a narrow baryonic state in the $pK^0_S$ and $\bar{p}K^0_S$ system has been performed in $ep$ collisions at HERA with the ZEUS detector using an integrated luminosity of 358 pb$^{-1}$ taken in 2003-2007. The search was performed with deep inelastic scattering events at an $ep$ centre-of-mass energy of 318 GeV for exchanged photon virtuality, $Q^2$, between 20 and 100 $\rm{} GeV^{2}$. Contrary to evidence presented for such a state around 1.52 GeV in a previous ZEUS analysis using a sample of 121 pb$^{-1}$ taken in 1996-2000, no resonance peak was found in the $p(\bar{p})K^0_S$ invariant-mass distribution in the range 1.45-1.7 GeV. Upper limits on the production cross section are set. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1604.02220v2-abstract-full').style.display = 'none'; document.getElementById('1604.02220v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 June, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 April, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">16 pages, 4 figures, accepted by Phys. Lett. B. Minor changes from journal reviewing process, including a small correction to figure 4</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY-16-065 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Lett. B 759 (2016) 446-453 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1604.01280">arXiv:1604.01280</a> <span> [<a href="https://arxiv.org/pdf/1604.01280">pdf</a>, <a href="https://arxiv.org/ps/1604.01280">ps</a>, <a href="https://arxiv.org/format/1604.01280">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"> Limits on the effective quark radius from inclusive $ep$ scattering at HERA </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=ZEUS+Collaboration"> ZEUS Collaboration</a>, <a href="/search/hep-ph?searchtype=author&query=Abramowicz%2C+H">H. Abramowicz</a>, <a href="/search/hep-ph?searchtype=author&query=Abt%2C+I">I. Abt</a>, <a href="/search/hep-ph?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/hep-ph?searchtype=author&query=Adamus%2C+M">M. Adamus</a>, <a href="/search/hep-ph?searchtype=author&query=Antonelli%2C+S">S. Antonelli</a>, <a href="/search/hep-ph?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ph?searchtype=author&query=Behnke%2C+O">O. Behnke</a>, <a href="/search/hep-ph?searchtype=author&query=Behrens%2C+U">U. Behrens</a>, <a href="/search/hep-ph?searchtype=author&query=Bertolin%2C+A">A. Bertolin</a>, <a href="/search/hep-ph?searchtype=author&query=Bhadra%2C+S">S. Bhadra</a>, <a href="/search/hep-ph?searchtype=author&query=Bloch%2C+I">I. Bloch</a>, <a href="/search/hep-ph?searchtype=author&query=Boos%2C+E+G">E. G. Boos</a>, <a href="/search/hep-ph?searchtype=author&query=Brock%2C+I">I. Brock</a>, <a href="/search/hep-ph?searchtype=author&query=Brook%2C+N+H">N. H. Brook</a>, <a href="/search/hep-ph?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/hep-ph?searchtype=author&query=Bruni%2C+A">A. Bruni</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=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/hep-ph?searchtype=author&query=Capua%2C+M">M. Capua</a>, <a href="/search/hep-ph?searchtype=author&query=Catterall%2C+C+D">C. D. Catterall</a>, <a href="/search/hep-ph?searchtype=author&query=Chwastowski%2C+J">J. Chwastowski</a>, <a href="/search/hep-ph?searchtype=author&query=Ciborowski%2C+J">J. Ciborowski</a>, <a href="/search/hep-ph?searchtype=author&query=Ciesielski%2C+R">R. Ciesielski</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A+M">A. M. Cooper-Sarkar</a> , et al. (103 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="1604.01280v1-abstract-short" style="display: inline;"> The high-precision HERA data allows searches up to TeV scales for Beyond the Standard Model contributions to electron-quark scattering. Combined measurements of the inclusive deep inelastic cross sections in neutral and charged current $ep$ scattering corresponding to a luminosity of around 1 fb$^{-1}$ have been used in this analysis. A new approach to the beyond the Standard Model analysis of the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1604.01280v1-abstract-full').style.display = 'inline'; document.getElementById('1604.01280v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1604.01280v1-abstract-full" style="display: none;"> The high-precision HERA data allows searches up to TeV scales for Beyond the Standard Model contributions to electron-quark scattering. Combined measurements of the inclusive deep inelastic cross sections in neutral and charged current $ep$ scattering corresponding to a luminosity of around 1 fb$^{-1}$ have been used in this analysis. A new approach to the beyond the Standard Model analysis of the inclusive $ep$ data is presented; simultaneous fits of parton distribution functions together with contributions of "new physics" processes were performed. Results are presented considering a finite radius of quarks within the quark form-factor model. The resulting 95% C.L. upper limit on the effective quark radius is $0.43\cdot 10^{-16}$ cm. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1604.01280v1-abstract-full').style.display = 'none'; document.getElementById('1604.01280v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 April, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">10 pages, 4 figures, accepted by Phys. Lett. B</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY-16-035 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1603.09628">arXiv:1603.09628</a> <span> [<a href="https://arxiv.org/pdf/1603.09628">pdf</a>, <a href="https://arxiv.org/ps/1603.09628">ps</a>, <a href="https://arxiv.org/format/1603.09628">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"> Combined QCD and electroweak analysis of HERA data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=ZEUS+Collaboration"> ZEUS Collaboration</a>, <a href="/search/hep-ph?searchtype=author&query=Abramowicz%2C+H">H. Abramowicz</a>, <a href="/search/hep-ph?searchtype=author&query=Abt%2C+I">I. Abt</a>, <a href="/search/hep-ph?searchtype=author&query=Adamczyk%2C+L">L. Adamczyk</a>, <a href="/search/hep-ph?searchtype=author&query=Adamus%2C+M">M. Adamus</a>, <a href="/search/hep-ph?searchtype=author&query=Antonelli%2C+S">S. Antonelli</a>, <a href="/search/hep-ph?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/hep-ph?searchtype=author&query=Behnke%2C+O">O. Behnke</a>, <a href="/search/hep-ph?searchtype=author&query=Behrens%2C+U">U. Behrens</a>, <a href="/search/hep-ph?searchtype=author&query=Bertolin%2C+A">A. Bertolin</a>, <a href="/search/hep-ph?searchtype=author&query=Bhadra%2C+S">S. Bhadra</a>, <a href="/search/hep-ph?searchtype=author&query=Bloch%2C+I">I. Bloch</a>, <a href="/search/hep-ph?searchtype=author&query=Boos%2C+E+G">E. G. Boos</a>, <a href="/search/hep-ph?searchtype=author&query=Brock%2C+I">I. Brock</a>, <a href="/search/hep-ph?searchtype=author&query=Brook%2C+N+H">N. H. Brook</a>, <a href="/search/hep-ph?searchtype=author&query=Brugnera%2C+R">R. Brugnera</a>, <a href="/search/hep-ph?searchtype=author&query=Bruni%2C+A">A. Bruni</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=Caldwell%2C+A">A. Caldwell</a>, <a href="/search/hep-ph?searchtype=author&query=Capua%2C+M">M. Capua</a>, <a href="/search/hep-ph?searchtype=author&query=Catterall%2C+C+D">C. D. Catterall</a>, <a href="/search/hep-ph?searchtype=author&query=Chwastowski%2C+J">J. Chwastowski</a>, <a href="/search/hep-ph?searchtype=author&query=Ciborowski%2C+J">J. Ciborowski</a>, <a href="/search/hep-ph?searchtype=author&query=Ciesielski%2C+R">R. Ciesielski</a>, <a href="/search/hep-ph?searchtype=author&query=Cooper-Sarkar%2C+A+M">A. M. Cooper-Sarkar</a> , et al. (102 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1603.09628v2-abstract-short" style="display: inline;"> A simultaneous fit of parton distribution functions (PDFs) and electroweak parameters to HERA data on deep inelastic scattering is presented. The input data are the neutral current and charged current inclusive cross sections which were previously used in the QCD analysis leading to the HERAPDF2.0 PDFs. In addition, the polarisation of the electron beam was taken into account for the ZEUS data rec… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.09628v2-abstract-full').style.display = 'inline'; document.getElementById('1603.09628v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1603.09628v2-abstract-full" style="display: none;"> A simultaneous fit of parton distribution functions (PDFs) and electroweak parameters to HERA data on deep inelastic scattering is presented. The input data are the neutral current and charged current inclusive cross sections which were previously used in the QCD analysis leading to the HERAPDF2.0 PDFs. In addition, the polarisation of the electron beam was taken into account for the ZEUS data recorded between 2004 and 2007. Results on the vector and axial-vector couplings of the Z boson to u- and d-type quarks, on the value of the electroweak mixing angle and the mass of the W boson are presented. The values obtained for the electroweak parameters are in agreement with Standard Model predictions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.09628v2-abstract-full').style.display = 'none'; document.getElementById('1603.09628v2-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 May, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 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">32 pages, 10 figures, accepted by Phys. Rev. D. Small corrections from proofing process and small change to Fig. 12 and Table 4</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> DESY-16-039 </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/1509.01061">arXiv:1509.01061</a> <span> [<a href="https://arxiv.org/pdf/1509.01061">pdf</a>, <a href="https://arxiv.org/ps/1509.01061">ps</a>, <a href="https://arxiv.org/format/1509.01061">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> </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/s10052-016-4246-y">10.1140/epjc/s10052-016-4246-y <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Combined analysis of charm-quark fragmentation-fraction measurements </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ph?searchtype=author&query=Lisovyi%2C+M">Mykhailo Lisovyi</a>, <a href="/search/hep-ph?searchtype=author&query=Verbytskyi%2C+A">Andrii Verbytskyi</a>, <a href="/search/hep-ph?searchtype=author&query=Zenaiev%2C+O">Oleksandr 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="1509.01061v4-abstract-short" style="display: inline;"> A summary of measurements of the fragmentation of charm quarks into a specific hadron is given. Measurements performed in photoproduction and deep inelastic scattering in $e^{\pm}p$, $pp$ and $e^+e^-$ collisions are compared, using up-to-date branching ratios. Within uncertainties, all measurements agree, supporting the hypothesis that fragmentation is independent of the specific production proces… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.01061v4-abstract-full').style.display = 'inline'; document.getElementById('1509.01061v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1509.01061v4-abstract-full" style="display: none;"> A summary of measurements of the fragmentation of charm quarks into a specific hadron is given. Measurements performed in photoproduction and deep inelastic scattering in $e^{\pm}p$, $pp$ and $e^+e^-$ collisions are compared, using up-to-date branching ratios. Within uncertainties, all measurements agree, supporting the hypothesis that fragmentation is independent of the specific production process. Averages of the fragmentation fractions over all measurements are presented. The average has significantly reduced uncertainties compared to individual measurements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.01061v4-abstract-full').style.display = 'none'; document.getElementById('1509.01061v4-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 July, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 September, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">29 pages, 2 figures, 16 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> MPP-2015-257 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> EPJ C 76 (2016) no.7, 397 </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> </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" role="navigation" aria-label="Secondary">  <div 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