Search for a new heavy scalar particle decaying into a Higgs boson and a new scalar singlet in final states with one or two light leptons and a pair of tau-leptons with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476344" target="_blank" >RIV/00216208:11320/23:10476344 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=37JIaMjB8O" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=37JIaMjB8O</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP10(2023)009" target="_blank" >10.1007/JHEP10(2023)009</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for a new heavy scalar particle decaying into a Higgs boson and a new scalar singlet in final states with one or two light leptons and a pair of tau-leptons with the ATLAS detector

Popis výsledku v původním jazyce

A search for a new heavy scalar particle X decaying into a Standard Model (SM)Higgs boson and a new singlet scalar particle S is presented. The search uses a protonproton(pp) collision data sample with an integrated luminosity of 140 fb-1 recorded ata centre-of-mass energy of SQUARE ROOTs = 13TeV with the ATLAS detector at the Large HadronCollider. The most sensitive mass parameter space is explored in X mass ranging from 500to 1500 GeV, with the corresponding S mass in the range 200-500 GeV. The search selectsevents with two hadronically decaying τ -lepton candidates from H RIGHTWARDS ARROW τ+τ- decays andone or two light leptons (ℓ = e, μ) from S RIGHTWARDS ARROW V V (V = W, Z) decays while the remainingV boson decays hadronically or to neutrinos. A multivariate discriminant based on eventkinematics is used to separate the signal from the background. No excess is observed beyondthe expected SM background and 95% confidence level upper limits between 72 fb and 542 fbare derived on the cross-section σ(pp RIGHTWARDS ARROW X RIGHTWARDS ARROW SH) assuming the same SM-Higgs boson-likedecay branching ratios for the S RIGHTWARDS ARROW V V decay. Upper limits on the visible cross-sectionsσ(pp RIGHTWARDS ARROW X RIGHTWARDS ARROW SH RIGHTWARDS ARROW WWτ τ ) and σ(pp RIGHTWARDS ARROW X RIGHTWARDS ARROW SH RIGHTWARDS ARROW ZZτ τ ) are also set in the ranges3-26 fb and 6-33 fb, respectively.

Název v anglickém jazyce

Search for a new heavy scalar particle decaying into a Higgs boson and a new scalar singlet in final states with one or two light leptons and a pair of tau-leptons with the ATLAS detector

Popis výsledku anglicky

A search for a new heavy scalar particle X decaying into a Standard Model (SM)Higgs boson and a new singlet scalar particle S is presented. The search uses a protonproton(pp) collision data sample with an integrated luminosity of 140 fb-1 recorded ata centre-of-mass energy of SQUARE ROOTs = 13TeV with the ATLAS detector at the Large HadronCollider. The most sensitive mass parameter space is explored in X mass ranging from 500to 1500 GeV, with the corresponding S mass in the range 200-500 GeV. The search selectsevents with two hadronically decaying τ -lepton candidates from H RIGHTWARDS ARROW τ+τ- decays andone or two light leptons (ℓ = e, μ) from S RIGHTWARDS ARROW V V (V = W, Z) decays while the remainingV boson decays hadronically or to neutrinos. A multivariate discriminant based on eventkinematics is used to separate the signal from the background. No excess is observed beyondthe expected SM background and 95% confidence level upper limits between 72 fb and 542 fbare derived on the cross-section σ(pp RIGHTWARDS ARROW X RIGHTWARDS ARROW SH) assuming the same SM-Higgs boson-likedecay branching ratios for the S RIGHTWARDS ARROW V V decay. Upper limits on the visible cross-sectionsσ(pp RIGHTWARDS ARROW X RIGHTWARDS ARROW SH RIGHTWARDS ARROW WWτ τ ) and σ(pp RIGHTWARDS ARROW X RIGHTWARDS ARROW SH RIGHTWARDS ARROW ZZτ τ ) are also set in the ranges3-26 fb and 6-33 fb, respectively.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10300 - Physical sciences

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

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

2023

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

46

Strana od-do

009

Kód UT WoS článku

001090914900001

EID výsledku v databázi Scopus

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