Search for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ meson

Search for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ meson

Bibliografiset tiedot
Parent link:	Journal of High Energy Physics Vol. 2020, iss. 11.— 2020.— [39, 41 p.]
Yhteisötekijä:	Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Muut tekijät:	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
Yhteenveto:	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.
Kieli:	englanti
Julkaistu:	2020
Aiheet:	электронный ресурс труды учёных ТПУ Hadron-Hadron scattering (experiments) Higgs physics Particle and resonance production
Linkit:	http://earchive.tpu.ru/handle/11683/72771 https://doi.org/10.1007/JHEP11(2020)039
Aineistotyyppi:	Elektroninen Kirjan osa
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666137

Samankaltaisia teoksia

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