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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10300 - Physical sciences

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

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

ISSN

0370-2693

e-ISSN

1873-2445

Volume of the periodical

850

Issue of the periodical within the volume

MAR

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

25

Pages from-to

138536

UT code for WoS article

001202034400001

EID of the result in the Scopus database

2-s2.0-85186584048