Search for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ meson; Journal of High Energy Physics; Vol. 2020, iss. 11

Search for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ meson; Journal of High Energy Physics; Vol. 2020, iss. 11

Bibliographic Details
Parent link:Journal of High Energy Physics
Vol. 2020, iss. 11.— 2020.— [39, 41 p.]
Corporate Author: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Other Authors: Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Tyurin N. E. Nikolay Evgenjevich, Babaev A. A. Anton Anatoljevich, Sukhikh L. G. Leonid Grigorievich
Summary:Title screen
Decays of the 125 GeV Higgs boson into a Z boson and a ρ0(770) or ϕ(1020) meson are searched for using proton-proton collision data collected by the CMS experiment at the LHC at √s = 13 TeV. The analysed data set corresponds to an integrated luminosity of 137 fb−1. Events are selected in which the Z boson decays into a pair of electrons or a pair of muons, and the ρ and ϕ mesons decay into pairs of pions and kaons, respectively. No significant excess above the background model is observed. As different polarization states are possible for the decay products of the Z boson and ρ or ϕ mesons, affecting the signal acceptance, scenarios in which the decays are longitudinally or transversely polarized are considered. Upper limits at the 95% confidence level on the Higgs boson branching fractions into Zρ and Zϕ are determined to be 1.04-1.31% and 0.31-0.40%, respectively, where the ranges reflect the considered polarization scenarios; these values are 740-940 and 730-950 times larger than the respective standard model expectations. These results constitute the first experimental limits on the two decay channels.
Language:English
Published: 2020
Subjects:
электронный ресурс
труды учёных ТПУ
Hadron-Hadron scattering (experiments)
Higgs physics
Particle and resonance production
Online Access:http://earchive.tpu.ru/handle/11683/72771
https://doi.org/10.1007/JHEP11(2020)039
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666137

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