Search for heavy neutral Higgs bosons decaying into a top quark pair in 140 fb-1 of proton-proton collision data at root s=13 TeV with the ATLAS detector

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F24%3A00390184" target="_blank" >RIV/68407700:21220/24:00390184 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21240/24:00390184 RIV/68407700:21340/24:00390184 RIV/68407700:21670/24:00390184

Výsledek na webu

<a href="https://doi.org/10.1007/JHEP08(2024)013" target="_blank" >https://doi.org/10.1007/JHEP08(2024)013</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP08(2024)013" target="_blank" >10.1007/JHEP08(2024)013</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for heavy neutral Higgs bosons decaying into a top quark pair in 140 fb-1 of proton-proton collision data at root s=13 TeV with the ATLAS detector

Popis výsledku v původním jazyce

A search for heavy pseudo-scalar (A) and scalar (H) Higgs bosons decaying into a top-quark pair (t (t) over bar) has been performed with 140 fb(-1) of proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider at a centre-of-mass energy of root s = 13TeV. Interference effects between the signal process and Standard Model (SM) t (t) over bar production are taken into account. Final states with exactly one or exactly two electrons or muons are considered. No significant deviation from the SM prediction is observed. The results of the search are interpreted in the context of a two-Higgs-doublet model (2HDM) of type II in the alignment limit with mass-degenerate pseudo-scalar and scalar Higgs bosons (m(A) = m(H)) and the hMSSM parameterisation of the minimal supersymmetric extension of the Standard Model. Ratios of the two vacuum expectation values, tan beta, smaller than 3.49 (3.16) are excluded at 95% confidence level for m(A) = m(H) = 400 GeV in the 2HDM (hMSSM). Masses up to 1240 GeV are excluded for the lowest tested tan beta value of 0.4 in the 2HDM. In the hMSSM, masses up to 950 GeV are excluded for tan beta = 1.0. In addition, generic exclusion limits are derived separately for single scalar and pseudo-scalar states for different choices of their mass and total width.

Název v anglickém jazyce

Search for heavy neutral Higgs bosons decaying into a top quark pair in 140 fb-1 of proton-proton collision data at root s=13 TeV with the ATLAS detector

Popis výsledku anglicky

A search for heavy pseudo-scalar (A) and scalar (H) Higgs bosons decaying into a top-quark pair (t (t) over bar) has been performed with 140 fb(-1) of proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider at a centre-of-mass energy of root s = 13TeV. Interference effects between the signal process and Standard Model (SM) t (t) over bar production are taken into account. Final states with exactly one or exactly two electrons or muons are considered. No significant deviation from the SM prediction is observed. The results of the search are interpreted in the context of a two-Higgs-doublet model (2HDM) of type II in the alignment limit with mass-degenerate pseudo-scalar and scalar Higgs bosons (m(A) = m(H)) and the hMSSM parameterisation of the minimal supersymmetric extension of the Standard Model. Ratios of the two vacuum expectation values, tan beta, smaller than 3.49 (3.16) are excluded at 95% confidence level for m(A) = m(H) = 400 GeV in the 2HDM (hMSSM). Masses up to 1240 GeV are excluded for the lowest tested tan beta value of 0.4 in the 2HDM. In the hMSSM, masses up to 950 GeV are excluded for tan beta = 1.0. In addition, generic exclusion limits are derived separately for single scalar and pseudo-scalar states for different choices of their mass and total width.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

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>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

1029-8479

Svazek periodika

2024

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

76

Strana od-do

—

Kód UT WoS článku

001457884900001

EID výsledku v databázi Scopus

2-s2.0-105007426956