Longitudinal Z-boson polarization and the Higgs boson production cross section at the Large Hadron Collider
| Popis: | Physics letters / B 821, 136613 (2021). doi:10.1016/j.physletb.2021.136613 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. Published by North-Holland Publ., Amsterdam |
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| Jazyk: | English |
| ISSN: | 0370-2693 |
| DOI: | 10.3204/PUBDB-2020-05245 |
| DOI: | 10.1016/j.physletb.2021.136613 |
| Přístupová URL adresa: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b004eaaa63084bf27d898155bf4556b http://www.sciencedirect.com/science/article/pii/S0370269321005530 |
| Rights: | OPEN |
| Přírůstkové číslo: | edsair.doi.dedup.....9b004eaaa63084bf27d898155bf4556b |
| Autor: | Simone Amoroso, O. Zenaiev, Francesco Hautmann, F. Giuli, A. Glazov, Juri Fiaschi |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Hadron
Parton momentum spectrum [transverse momentum] gluon gluon --> lepton antilepton transverse momentum: momentum spectrum rapidity [Higgs particle] High Energy Physics - Phenomenology (hep-ph) CERN LHC Coll: upgrade scattering [p p] pair production [lepton] Nuclear Experiment Physics gluon: distribution function Large Hadron Collider fusion [gluon] Electroweak interaction hep-ph lepton: transverse momentum High Energy Physics - Phenomenology Higgs particle: production Higgs boson Higgs particle: rapidity gluon: fusion p p: scattering Nuclear and High Energy Physics Particle physics lepton: pair production QC1-999 FOS: Physical sciences angular distribution [lepton] Z0: longitudinal ddc:530 upgrade [CERN LHC Coll] Particle Physics - Phenomenology Gauge boson lepton: angular distribution High Energy Physics::Phenomenology polarization [Z0] longitudinal [Z0] Gluon p p --> lepton antilepton production [Higgs particle] Z0: polarization High Energy Physics::Experiment distribution function [gluon] transverse momentum [lepton] Lepton |
| Zdroj: | Physics Letters B, Vol 821, Iss, Pp 136613-(2021) 1-6 (2020). doi:10.3204/PUBDB-2020-05245 Physics Letters Physics letters / B 821, 136613 (2021). doi:10.1016/j.physletb.2021.136613 Physics letters : B |
| ISSN: | 0370-2693 |
| DOI: | 10.3204/PUBDB-2020-05245 |
| Popis: | Physics letters / B 821, 136613 (2021). doi:10.1016/j.physletb.2021.136613 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. Published by North-Holland Publ., Amsterdam |
| Databáze: | OpenAIRE |
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