Search for the production of a Higgs boson in association with a single top quark in pp collisions at SQUARE ROOTs = 13 TeV with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10511555" target="_blank" >RIV/00216208:11320/25:10511555 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=CVhiUwMitW" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=CVhiUwMitW</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP10(2025)093" target="_blank" >10.1007/JHEP10(2025)093</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for the production of a Higgs boson in association with a single top quark in pp collisions at SQUARE ROOTs = 13 TeV with the ATLAS detector

Popis výsledku v původním jazyce

A search for the production of a Higgs boson in association with a single top quark, tH, is presented. The analysis uses proton-proton collision data corresponding to anintegrated luminosity of 140 fb−1 at a centre-of-mass energy of 13TeV, collected by the ATLASdetector at the LHC. The search targets Higgs-boson decays into b¯b, WW∗, ZZ∗, and τ τ ,accompanied by an isolated lepton (electron or muon) from the top-quark decay. Multivariatetechniques are employed to enhance the separation between signal and background processes.The observed signal strength, μtH, defined as the ratio between the measured cross-section andthe predicted Standard Model value, is μtH = 8.1 ± 2.6 (stat.) ± 2.0 (syst.). The significanceof the observed (expected) signal above the background-only expectation is 2.8 (0.4) standarddeviations. The corresponding observed (expected) upper limit at the 95% confidence level onthe tH cross-section is found to be 13.9 (6.1) times the value predicted by the Standard Model.An interpretation with an inverted sign of the top-quark Yukawa coupling is performed, and the signal strength and corresponding limit are reported.

Název v anglickém jazyce

Search for the production of a Higgs boson in association with a single top quark in pp collisions at SQUARE ROOTs = 13 TeV with the ATLAS detector

Popis výsledku anglicky

A search for the production of a Higgs boson in association with a single top quark, tH, is presented. The analysis uses proton-proton collision data corresponding to anintegrated luminosity of 140 fb−1 at a centre-of-mass energy of 13TeV, collected by the ATLASdetector at the LHC. The search targets Higgs-boson decays into b¯b, WW∗, ZZ∗, and τ τ ,accompanied by an isolated lepton (electron or muon) from the top-quark decay. Multivariatetechniques are employed to enhance the separation between signal and background processes.The observed signal strength, μtH, defined as the ratio between the measured cross-section andthe predicted Standard Model value, is μtH = 8.1 ± 2.6 (stat.) ± 2.0 (syst.). The significanceof the observed (expected) signal above the background-only expectation is 2.8 (0.4) standarddeviations. The corresponding observed (expected) upper limit at the 95% confidence level onthe tH cross-section is found to be 13.9 (6.1) times the value predicted by the Standard Model.An interpretation with an inverted sign of the top-quark Yukawa coupling is performed, and the signal strength and corresponding limit are reported.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/EH22_008%2F0004632" target="_blank" >EH22_008/0004632: Výzkum základních stavebních kamenů hmoty s využitím špičkových technologií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

1029-8479

Svazek periodika

2025

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

70

Strana od-do

093

Kód UT WoS článku

001638776600001

EID výsledku v databázi Scopus

2-s2.0-105023669364