Search for the decay of the Higgs boson to a ???? boson and a light pseudoscalar particle decaying to two photons

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10493815" target="_blank" >RIV/00216208:11320/24:10493815 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=shZNE0kr4h" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=shZNE0kr4h</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2024.138536" target="_blank" >10.1016/j.physletb.2024.138536</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for the decay of the Higgs boson to a ???? boson and a light pseudoscalar particle decaying to two photons

Popis výsledku v původním jazyce

A search for the decay of the Higgs boson to a ???? boson and a light, pseudoscalar particle, ????, decaying respectively to two leptons and to two photons is reported. The search uses the full LHC Run 2 proton-proton collision data at SQUARE ROOT???? = 13 TeV, corresponding to 139 fb-1 collected by the ATLAS detector. This is one of the first searches for this specific decay mode of the Higgs boson, and it probes unexplored parameter space in models with axion-like particles (ALPs) and extended scalar sectors. The mass of the ???? particle is assumed to be in the range 0.1-33 GeV. The data are analysed in two categories: a merged category where the photons from the ???? decay are reconstructed in the ATLAS calorimeter as a single cluster, and a resolved category in which two separate photons are detected. The main background processes are from Standard Model ???? boson production in association with photons or jets. The data are in agreement with the background predictions, and upper limits on the branching ratio of the Higgs boson decay to ???????? times the branching ratio ???? RIGHTWARDS ARROW ???????? are derived at the 95% confidence level and they range from 0.08% to 2% depending on the mass of the ???? particle. The results are also interpreted in the context of ALP models.

Název v anglickém jazyce

Search for the decay of the Higgs boson to a ???? boson and a light pseudoscalar particle decaying to two photons

Popis výsledku anglicky

A search for the decay of the Higgs boson to a ???? boson and a light, pseudoscalar particle, ????, decaying respectively to two leptons and to two photons is reported. The search uses the full LHC Run 2 proton-proton collision data at SQUARE ROOT???? = 13 TeV, corresponding to 139 fb-1 collected by the ATLAS detector. This is one of the first searches for this specific decay mode of the Higgs boson, and it probes unexplored parameter space in models with axion-like particles (ALPs) and extended scalar sectors. The mass of the ???? particle is assumed to be in the range 0.1-33 GeV. The data are analysed in two categories: a merged category where the photons from the ???? decay are reconstructed in the ATLAS calorimeter as a single cluster, and a resolved category in which two separate photons are detected. The main background processes are from Standard Model ???? boson production in association with photons or jets. The data are in agreement with the background predictions, and upper limits on the branching ratio of the Higgs boson decay to ???????? times the branching ratio ???? RIGHTWARDS ARROW ???????? are derived at the 95% confidence level and they range from 0.08% to 2% depending on the mass of the ???? particle. The results are also interpreted in the context of ALP models.

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

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

850

Číslo periodika v rámci svazku

MAR

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

25

Strana od-do

138536

Kód UT WoS článku

001202034400001

EID výsledku v databázi Scopus

2-s2.0-85186584048