Search for rare decays of the Z and Higgs bosons to a J/ψ or ψ(2S) meson and a photon in proton-proton collisions at √s=13 TeV

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510962" target="_blank" >RIV/00216208:11320/25:10510962 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=om6ch_5DW7" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=om6ch_5DW7</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.physletb.2025.139462" target="_blank" >10.1016/j.physletb.2025.139462</a>

Result language
angličtina
Original language name
Search for rare decays of the Z and Higgs bosons to a J/ψ or ψ(2S) meson and a photon in proton-proton collisions at √s=13 TeV
Original language description
A search is presented for rare decays of the Z and Higgs bosons to a photon and a J/psi or a psi(2S) meson, with the charmonium state subsequentially decaying to a pair of muons. The data set corresponds to an integrated luminosity of 123 fb(-1) of proton-proton collisions at a center-of-mass energy of 13 TeV collected with the CMS detector at the LHC. No evidence for branching fractions of these rare decay channels larger than predicted in the standard model is observed. Upper limits at 95% confidence level are set: B(H -> J/psi gamma) < 2.6 x 10(-4), B(H -> psi(2S)gamma) < 9.9 x 10(-4), B(Z -> J/psi gamma) < 0.6 x 10(-6), and B(Z -> psi(2S)gamma) < 1.3 x 10(-6). The ratio of the Higgs boson coupling modifiers kappa(c)/kappa(gamma) is constrained to be in the interval (-157, +199) at 95% confidence level. Assuming kappa(gamma) = 1, this interval becomes (-166, +208).
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10300 - Physical sciences

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
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
865
Issue of the periodical within the volume
Apr 25
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
28
Pages from-to
139462
UT code for WoS article
001498294500001
EID of the result in the Scopus database
2-s2.0-105002784406

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