Longitudinal Z-boson polarization and the Higgs boson production cross section at the Large Hadron Collider
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...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-10-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269321005530 |
| _version_ | 1818648707360358400 |
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| author | S. Amoroso J. Fiaschi F. Giuli A. Glazov F. Hautmann O. Zenaiev |
| author_facet | S. Amoroso J. Fiaschi F. Giuli A. Glazov F. Hautmann O. Zenaiev |
| author_sort | S. Amoroso |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-17T01:22:42Z |
| format | Article |
| id | doaj.art-36ac3a3d6d684a0195e997b7e00317e2 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-17T01:22:42Z |
| publishDate | 2021-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-36ac3a3d6d684a0195e997b7e00317e22022-12-21T22:08:46ZengElsevierPhysics Letters B0370-26932021-10-01821136613Longitudinal Z-boson polarization and the Higgs boson production cross section at the Large Hadron ColliderS. Amoroso0J. Fiaschi1F. Giuli2A. Glazov3F. Hautmann4O. Zenaiev5Deutsches Elektronen-Synchrotron DESY, D 22607 Hamburg, GermanyDepartment of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX, United Kingdom of Great Britain and Northern Ireland; Institut für Theoretische Physik, Universität Münster, D 48149 Münster, GermanyCERN, CH-1211 Geneva 23, Switzerland; University of Rome Tor Vergata and INFN, Sezione di Roma 2, 00133 Roma, ItalyDeutsches Elektronen-Synchrotron DESY, D 22607 Hamburg, GermanyElementaire Deeltjes Fysica, Universiteit Antwerpen, B 2020 Antwerpen, Belgium; Theoretical Physics Department, University of Oxford, Oxford OX1 3PU, United Kingdom of Great Britain and Northern Ireland; Corresponding author.CERN, CH-1211 Geneva 23, SwitzerlandCharged 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.http://www.sciencedirect.com/science/article/pii/S0370269321005530 |
| spellingShingle | S. Amoroso J. Fiaschi F. Giuli A. Glazov F. Hautmann O. Zenaiev Longitudinal Z-boson polarization and the Higgs boson production cross section at the Large Hadron Collider Physics Letters B |
| title | Longitudinal Z-boson polarization and the Higgs boson production cross section at the Large Hadron Collider |
| title_full | Longitudinal Z-boson polarization and the Higgs boson production cross section at the Large Hadron Collider |
| title_fullStr | Longitudinal Z-boson polarization and the Higgs boson production cross section at the Large Hadron Collider |
| title_full_unstemmed | Longitudinal Z-boson polarization and the Higgs boson production cross section at the Large Hadron Collider |
| title_short | Longitudinal Z-boson polarization and the Higgs boson production cross section at the Large Hadron Collider |
| title_sort | longitudinal z boson polarization and the higgs boson production cross section at the large hadron collider |
| url | http://www.sciencedirect.com/science/article/pii/S0370269321005530 |
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