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AbstractA search for a Higgs boson decaying into a pair of electrons or muons and a photon is described. Higgs boson decays to a Z boson and a photon (H → Zγ→ℓℓγ,ℓ= e orμ), or to two photons, one of which has an internal conversion into a muon pair (H →γ*γ→μμγ) were considered. The analysis is performed using a data set recorded by the CMS experiment at the LHC from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1. No significant excess above the background prediction has been found. Limits are set on the cross section for a standard model Higgs boson decaying to opposite-sign electron or muon pairs and a photon. The observed limits on cross section times the corresponding branching fractions vary between 1.4 and 4.0 (6.1 and 11.4) times the standard model cross section for H →γ*γ→μμγ(H → Zγ→ℓℓγ) in the 120–130 GeV mass range of theℓℓγsystem. The H →γ*γ→μμγand H → Zγ→ℓℓγanalyses are combined formH=125GeV, obtaining an observed (expected) 95% confidence level upper limit of 3.9 (2.0) times the standard model cross section.

More information Original publication

DOI

10.1007/jhep11(2018)152

Type

Journal article

Publisher

Springer Science and Business Media LLC

Publication Date

2018-11-01T00:00:00+00:00

Volume

2018