Search for the decay of a Higgs boson in the ℓℓγ channel in proton-proton collisions at √s=13 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Search for the decay of a Higgs boson in the ℓℓγ channel in proton-proton collisions at √s=13 TeV. Journal of High Energy Physics, 2018 (11). pp. 1-41. ISSN 1029-8479

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Abstract

A 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 → ``γ,` = e or µ), 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 → ``γ) in the 120–130 GeV mass range of the ``γ system. The H → γ ∗γ → µµγ and H → Zγ → ``γ analyses are combined for mH = 125 GeV, obtaining an observed (expected) 95% confidence level upper limit of 3.9 (2.0) times the standard model cross section.

Item Type:	Article (Journal)
Additional Information:	7861/69751
Uncontrolled Keywords:	Beyond Standard Model, Hadron-Hadron scattering (experiments), Higgs physics
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	16 Jan 2019 12:06
Last Modified:	15 Jul 2019 09:47
URI:	http://irep.iium.edu.my/id/eprint/69751

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