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Between even and odd: probing the CP nature of the Higgs-Top coupling

As we enter the era of precision at the LHC, excluding specific charge-parity (CP) scenarios is no longer enough: we want to detect and precisely measure the angle that determines the possible admixture of CP-even and CP-odd components in the Higgs-top Yukawa coupling. The Higgs boson production in...

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Autor principal: Carvalho, Luisa
Lenguaje:eng
Publicado: 2022
Materias:
Acceso en línea:http://cds.cern.ch/record/2816271
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author Carvalho, Luisa
author_facet Carvalho, Luisa
author_sort Carvalho, Luisa
collection CERN
description As we enter the era of precision at the LHC, excluding specific charge-parity (CP) scenarios is no longer enough: we want to detect and precisely measure the angle that determines the possible admixture of CP-even and CP-odd components in the Higgs-top Yukawa coupling. The Higgs boson production in association with top-quarks (ttH and tH), in the H->bb decay channel, offers a unique possibility to study this interaction since it depends only on Yukawa couplings and relies on the tree-level couplings between the Higgs and the fermions. Targeting events where one or both top quarks decay leptonically provides a handle to reconstruct the top-quarks, whose four-momenta can be used to construct CP-sensitive observables. In this communication, the first measurement of the CP-mixing angle in the ttH(H->bb) channel using the full Run-2 dataset collected by the ATLAS experiment will be presented.
id cern-2816271
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2022
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spelling cern-28162712023-10-06T13:34:45Zhttp://cds.cern.ch/record/2816271engCarvalho, LuisaBetween even and odd: probing the CP nature of the Higgs-Top couplingParticle Physics - ExperimentAs we enter the era of precision at the LHC, excluding specific charge-parity (CP) scenarios is no longer enough: we want to detect and precisely measure the angle that determines the possible admixture of CP-even and CP-odd components in the Higgs-top Yukawa coupling. The Higgs boson production in association with top-quarks (ttH and tH), in the H->bb decay channel, offers a unique possibility to study this interaction since it depends only on Yukawa couplings and relies on the tree-level couplings between the Higgs and the fermions. Targeting events where one or both top quarks decay leptonically provides a handle to reconstruct the top-quarks, whose four-momenta can be used to construct CP-sensitive observables. In this communication, the first measurement of the CP-mixing angle in the ttH(H->bb) channel using the full Run-2 dataset collected by the ATLAS experiment will be presented.ATL-PHYS-SLIDE-2022-304oai:cds.cern.ch:28162712022-07-20
spellingShingle Particle Physics - Experiment
Carvalho, Luisa
Between even and odd: probing the CP nature of the Higgs-Top coupling
title Between even and odd: probing the CP nature of the Higgs-Top coupling
title_full Between even and odd: probing the CP nature of the Higgs-Top coupling
title_fullStr Between even and odd: probing the CP nature of the Higgs-Top coupling
title_full_unstemmed Between even and odd: probing the CP nature of the Higgs-Top coupling
title_short Between even and odd: probing the CP nature of the Higgs-Top coupling
title_sort between even and odd: probing the cp nature of the higgs-top coupling
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2816271
work_keys_str_mv AT carvalholuisa betweenevenandoddprobingthecpnatureofthehiggstopcoupling