Probing the CP nature of the top-Higgs Yukawa coupling in tt-H and tH events with H →bb- decays using the ATLAS detector at the LHC

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00617216" target="_blank" >RIV/68378271:_____/24:00617216 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0364435" target="_blank" >https://hdl.handle.net/11104/0364435</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2024.138469" target="_blank" >10.1016/j.physletb.2024.138469</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Probing the CP nature of the top-Higgs Yukawa coupling in tt-H and tH events with H →bb- decays using the ATLAS detector at the LHC

Popis výsledku v původním jazyce

The CP properties of the coupling between the Higgs boson and the top quark are investigated using 139 fb−1 of proton–proton collision data recorded by the ATLAS experiment at the LHCat a centre-of-mass energy of √s = 13 TeV. The CP structure of the top quark–Higgs boson Yukawa coupling is probed in events with a Higgs boson decaying into a pair of b-quarks and produced in association with either a pair of top quarks, t- th, or a single top quark, th Events containing one or two electrons or muons are used for the measurement. Multivariate techniques are used to select regions enriched in t- tH and tH events, where dedicated CP-sensitive observables are exploited. In an extension of the Standard Model (SM) with a CP-odd admixture in the top–Higgs Yukawa coupling, the mixing angle between CP-even and CP-odd couplings is measured to be α = 11◦+52◦−73◦ , compatible with the SM prediction corresponding to α = 0.

Název v anglickém jazyce

Probing the CP nature of the top-Higgs Yukawa coupling in tt-H and tH events with H →bb- decays using the ATLAS detector at the LHC

Popis výsledku anglicky

The CP properties of the coupling between the Higgs boson and the top quark are investigated using 139 fb−1 of proton–proton collision data recorded by the ATLAS experiment at the LHCat a centre-of-mass energy of √s = 13 TeV. The CP structure of the top quark–Higgs boson Yukawa coupling is probed in events with a Higgs boson decaying into a pair of b-quarks and produced in association with either a pair of top quarks, t- th, or a single top quark, th Events containing one or two electrons or muons are used for the measurement. Multivariate techniques are used to select regions enriched in t- tH and tH events, where dedicated CP-sensitive observables are exploited. In an extension of the Standard Model (SM) with a CP-odd admixture in the top–Higgs Yukawa coupling, the mixing angle between CP-even and CP-odd couplings is measured to be α = 11◦+52◦−73◦ , compatible with the SM prediction corresponding to α = 0.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physics Letters. B

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

849

Číslo periodika v rámci svazku

Feb

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

25

Strana od-do

138469

Kód UT WoS článku

001185312700001

EID výsledku v databázi Scopus

2-s2.0-85185283920