Search for non-resonant Higgs boson pair production in the 2b + 2ℓ + ETmiss final state 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%2F24%3A10493863" target="_blank" >RIV/00216208:11320/24:10493863 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=S.goCVl5O3" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=S.goCVl5O3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP02(2024)037" target="_blank" >10.1007/JHEP02(2024)037</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for non-resonant Higgs boson pair production in the 2b + 2ℓ + ETmiss final state in pp collisions at SQUARE ROOTs = 13 TeV with the ATLAS detector

Popis výsledku v původním jazyce

A search for non-resonant Higgs boson pair (HH) production is presented, in which one of the Higgs bosons decays to a b-quark pair (b-b) and the other decays to WWASTERISK OPERATOR, ZZASTERISK OPERATOR, or τ+τ-, with in each case a final state with ℓ+ℓ-+ neutrinos (ℓ = e, μ). The analysis targets separately the gluon-gluon fusion and vector boson fusion production modes. Data recorded by the ATLAS detector in proton-proton collisions at a centre-of-mass energy of 13TeV at the Large Hadron Collider, corresponding to an integrated luminosity of 140 fb-1, are used in this analysis. Events are selected to have exactly two b-tagged jets and two leptons with opposite electric charge and missing transverse momentum in the final state. These events are classified using multivariate analysis algorithms to separate the HH events from other Standard Model processes. No evidence of the signal is found. The observed (expected) upper limit on the cross-section for non-resonant Higgs boson pair production is determined to be 9.7 (16.2) times the Standard Model prediction at 95% confidence level. The Higgs boson self-interaction coupling parameter κλ and the quadrilinear coupling parameter κ2V are each separately constrained by this analysis to be within the ranges [-6.2, 13.3] and [-0.17, 2.4], respectively, at 95% confidence level, when all other parameters are fixed.

Název v anglickém jazyce

Search for non-resonant Higgs boson pair production in the 2b + 2ℓ + ETmiss final state in pp collisions at SQUARE ROOTs = 13 TeV with the ATLAS detector

Popis výsledku anglicky

A search for non-resonant Higgs boson pair (HH) production is presented, in which one of the Higgs bosons decays to a b-quark pair (b-b) and the other decays to WWASTERISK OPERATOR, ZZASTERISK OPERATOR, or τ+τ-, with in each case a final state with ℓ+ℓ-+ neutrinos (ℓ = e, μ). The analysis targets separately the gluon-gluon fusion and vector boson fusion production modes. Data recorded by the ATLAS detector in proton-proton collisions at a centre-of-mass energy of 13TeV at the Large Hadron Collider, corresponding to an integrated luminosity of 140 fb-1, are used in this analysis. Events are selected to have exactly two b-tagged jets and two leptons with opposite electric charge and missing transverse momentum in the final state. These events are classified using multivariate analysis algorithms to separate the HH events from other Standard Model processes. No evidence of the signal is found. The observed (expected) upper limit on the cross-section for non-resonant Higgs boson pair production is determined to be 9.7 (16.2) times the Standard Model prediction at 95% confidence level. The Higgs boson self-interaction coupling parameter κλ and the quadrilinear coupling parameter κ2V are each separately constrained by this analysis to be within the ranges [-6.2, 13.3] and [-0.17, 2.4], respectively, at 95% confidence level, when all other parameters are fixed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

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

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

—

Svazek periodika

2024

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

48

Strana od-do

37

Kód UT WoS článku

001380583300001

EID výsledku v databázi Scopus

2-s2.0-85190958560