Search for the decay of a Higgs boson in the $\ell \ell \gamma$ channel in proton-proton collisions at $\sqrt{s}=$ 13 TeV

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 $\to$ Z$\gamma \to \ell \ell \gamma$, $\ell =$ e or $\mu$), or to two photons, one of which has an internal conversion into a muon pair (H $\to {\gamma }^{\ast }\gamma \to \mu \mu \gamma$) 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 $\to {\gamma }^{\ast }\gamma \to \mu \mu \gamma$ (H $\to$ Z$\gamma \to \ell \ell \gamma$) in the 120-130 GeV mass range of the $\ell \ell \gamma$ system. The H $\to {\gamma }^{\ast }\gamma \to \mu \mu \gamma$ and H $\to$ Z$\gamma \to \ell \ell \gamma$ analyses are combined for $m_{\mathrm{H}}=$ 125 GeV, obtaining an observed (expected) 95% confidence level upper limit of 3.9 (2.0) times the standard model cross section.

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIG-17-007 (CMS Public Pages)

References in corpus (18)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• Parton distributions for the LHC
• New parton distributions for collider physics
• Combined Measurement of the Higgs Boson Mass in $pp$ Collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS Experiments
• Particle-flow reconstruction and global event description with the CMS detector
• Pileup subtraction using jet areas
• The CMS trigger system
• The Catchment Area of Jets
• MCFM for the Tevatron and the LHC
• Measurements of properties of the Higgs boson decaying into the four-lepton final state in pp collisions at sqrt(s) = 13 TeV
• Measurement of the inelastic proton-proton cross section at $\sqrt{s}=$ 13 TeV
• Higgs boson decays to $\gamma \gamma$ and $Z\gamma$ in models with Higgs extensions
• Higgs Decays to $ZZ$ and $Z\gamma$ in the SMEFT: an NLO analysis
• Searches for the $Z\gamma$ decay mode of the Higgs boson and for new high-mass resonances in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Calculation of the decay ${\bm H\bm\to\bm e\bar{\bm e}\bm\ga}$
• Internal conversions in Higgs decays to two photons
• Angular distribution and forward-backward asymmetry of the Higgs-boson decay to photon and lepton pair

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• Interpretation of LHC excesses at 95 GeV and 152 GeV in an extended Georgi-Machacek model
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