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arXiv · 1601.00790

Search for the Higgs Boson Decays to a Photon and Two Leptons with Low Dilepton Invariant Mass

Andrey Pozdnyakov
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Abstract

A search for a Higgs boson decay $H\toγ^*γ\to\ell\ellγ$ is presented. The analysis is performed using proton-proton collision data recorded by the CMS detector at the CERN LHC at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.7 fb$^{-1}$. The selected events have an opposite-sign muon or electron pair and a high transverse momentum photon. No excess above background has been found in the three-body invariant mass range $120<m_{\ell\ellγ}<150$ GeV, and limits have been derived for the Higgs boson production cross section times branching fraction for the $H\toγ^*γ\to\ell\ellγ$ decay, where the dilepton invariant mass is less than 20 GeV. For a Higgs boson with $m_H=125$ GeV, a $95\%$ confidence level (CL) exclusion observed (expected) limit is 6.7 ($5.9^{+.2.8}_{-1.8}$) times the standard model prediction. Additionally, a search for $H\to(J/Ψ)γ\toμμγ$ process is presented, and an upper limit at $95\%$ CL on the branching fraction of the $H\to(J/Ψ)γ$ decay for the 125 GeV Higgs boson is set at $1.5\times10^{-3}$.

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Andrey Pozdnyakov. 2016-01-05. Search for the Higgs Boson Decays to a Photon and Two Leptons with Low Dilepton Invariant Mass. https://arxiv.org/abs/1601.00790

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