Evidence for the Higgs boson decay to a $Z$ boson and a photon at the LHC

Abstract

The first evidence for the Higgs boson decay to a $Z$ boson and a photon is presented, with a statistical significance of 3.4 standard deviations. The result is derived from a combined analysis of the searches performed by the ATLAS and CMS Collaborations with proton-proton collision data sets collected at the CERN Large Hadron Collider (LHC) from 2015 to 2018. These correspond to integrated luminosities of around 140 fb${}^{-1}$ for each experiment, at a center-of-mass energy of 13 TeV. The measured signal yield is $2.2\pm 0.7$ times the Standard Model prediction, and agrees with the theoretical expectation within 1.9 standard deviations.

48 pages in total, author list starting page 12, 3 figures. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2022-22/

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Cited by in corpus (12)

• Anatomy of Vector-Like Top-Quark Models in the Alignment Limit of the 2-Higgs Doublet Model Type-II
• Production of dileptonic bound states in the Higgs boson decay
• Vector Dark Matter with Higgs Portal in Type II Seesaw framework
• $H\to Z\gamma$ decay and $CP$ violation
• Precision Higgs Boson Probe of Type-II Seesaw Models
• $CP$ violation in the $HZZ$ vertex and left-right asymmetries
• Searching for the toponium ${\eta }_t$ with the ${\eta }_t$ $\to$ $W^{+}{W}^{-}$ decay
• Search for $\gamma$H production and constraints on the Yukawa couplings of light quarks to the Higgs boson
• Higgs Boson Searches at the LHC Beyond the Standard Model
• Trials Factor for Semi-Supervised NN Classifiers in Searches for Narrow Resonances at the LHC
• Rare Higgs Decay into a Photon and a Z Boson in Radiatively-Driven Natural Supersymmetry
• $CP$-odd form factor in the $HWW$ vertex