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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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Lenguaje: | eng |
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2022
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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 |
record_format | invenio |
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 |