Please use this identifier to cite or link to this item:
http://bura.brunel.ac.uk/handle/2438/21864
Title: | Search for decays of the 125 GeV Higgs boson into a Z boson and a $ρ$ or $φ$ meson |
Authors: | Collaboration, CMS |
Keywords: | Hadron-Hadron scattering (experiments);Higgs physics;Particle and resonance production |
Issue Date: | 10-Nov-2020 |
Publisher: | Springer |
Citation: | The CMS collaboration., Sirunyan, A.M., Tumasyan, A. et al. Search for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ meson. J. High Energ. Phys. 2020, 39 (2020). |
Abstract: | 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. |
URI: | http://bura.brunel.ac.uk/handle/2438/21864 |
ISSN: | 1029-8479 |
Other Identifiers: | http://arxiv.org/abs/2007.05122v1 http://arxiv.org/abs/2007.05122v1 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers |
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