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Direct Search for the Higgs Boson to Charm Quarks Coupling at ATLAS

A direct search for the Standard Model Higgs boson decays to a pair of charm quarks is presented, probing the Higgs boson Yukawa couplings to the second generation of fermions. This analysis makes use of the full LHC Run 2 dataset collected with the ATLAS detector, corresponding to an integrated lum...

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Detalles Bibliográficos
Autor principal: Mendes Jacques Da Costa, Antonio Manuel
Lenguaje:eng
Publicado: 2022
Materias:
Acceso en línea:http://cds.cern.ch/record/2804143
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author Mendes Jacques Da Costa, Antonio Manuel
author_facet Mendes Jacques Da Costa, Antonio Manuel
author_sort Mendes Jacques Da Costa, Antonio Manuel
collection CERN
description A direct search for the Standard Model Higgs boson decays to a pair of charm quarks is presented, probing the Higgs boson Yukawa couplings to the second generation of fermions. This analysis makes use of the full LHC Run 2 dataset collected with the ATLAS detector, corresponding to an integrated luminosity of 139 fb-1 of proton collisions at a centre-of-mass energy of 13 TeV. An extrapolation of this search to the HL-LHC conditions - a centre-of-mass energy of 14 TeV, an integrated luminosity of 3000 fb-1 is also presented. The production of the Higgs boson in association with a W or Z boson is targeted, where only leptonic decays of the W or Z boson are considered. The analysis is organised in three channels according to the reconstructed lepton multiplicity. Both charm and bottom jet tagging algorithms are used to identify the signature of the Higgs boson decay to charm quarks, while reducing contamination from Higgs boson decays to bottom quarks. The full Run 2 search improves the constraint on the cross-section times branching fraction for a Higgs boson with a mass of 125 GeV previously presented by ATLAS, using an integrated luminosity of 36 fb−1 of proton-proton collisions at the same centre-of-mass energy. A direct limit on the charm Yukawa coupling modifier from Higgs boson to charm quark decays is also set. The HL-LHC extrapolation of this search has the potential to further improve the constraints.
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spelling cern-28041432022-03-17T22:56:01Zhttp://cds.cern.ch/record/2804143engMendes Jacques Da Costa, Antonio ManuelDirect Search for the Higgs Boson to Charm Quarks Coupling at ATLASParticle Physics - ExperimentA direct search for the Standard Model Higgs boson decays to a pair of charm quarks is presented, probing the Higgs boson Yukawa couplings to the second generation of fermions. This analysis makes use of the full LHC Run 2 dataset collected with the ATLAS detector, corresponding to an integrated luminosity of 139 fb-1 of proton collisions at a centre-of-mass energy of 13 TeV. An extrapolation of this search to the HL-LHC conditions - a centre-of-mass energy of 14 TeV, an integrated luminosity of 3000 fb-1 is also presented. The production of the Higgs boson in association with a W or Z boson is targeted, where only leptonic decays of the W or Z boson are considered. The analysis is organised in three channels according to the reconstructed lepton multiplicity. Both charm and bottom jet tagging algorithms are used to identify the signature of the Higgs boson decay to charm quarks, while reducing contamination from Higgs boson decays to bottom quarks. The full Run 2 search improves the constraint on the cross-section times branching fraction for a Higgs boson with a mass of 125 GeV previously presented by ATLAS, using an integrated luminosity of 36 fb−1 of proton-proton collisions at the same centre-of-mass energy. A direct limit on the charm Yukawa coupling modifier from Higgs boson to charm quark decays is also set. The HL-LHC extrapolation of this search has the potential to further improve the constraints.ATL-PHYS-SLIDE-2022-034oai:cds.cern.ch:28041432022-03-17
spellingShingle Particle Physics - Experiment
Mendes Jacques Da Costa, Antonio Manuel
Direct Search for the Higgs Boson to Charm Quarks Coupling at ATLAS
title Direct Search for the Higgs Boson to Charm Quarks Coupling at ATLAS
title_full Direct Search for the Higgs Boson to Charm Quarks Coupling at ATLAS
title_fullStr Direct Search for the Higgs Boson to Charm Quarks Coupling at ATLAS
title_full_unstemmed Direct Search for the Higgs Boson to Charm Quarks Coupling at ATLAS
title_short Direct Search for the Higgs Boson to Charm Quarks Coupling at ATLAS
title_sort direct search for the higgs boson to charm quarks coupling at atlas
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2804143
work_keys_str_mv AT mendesjacquesdacostaantoniomanuel directsearchforthehiggsbosontocharmquarkscouplingatatlas