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arXiv · 2309.03501

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

ATLAS·CMS Collaborations
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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 $2.2\pm0.7$ times the Standard Model prediction, and agrees with the theoretical expectation within 1.9 standard deviations.

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ATLAS, CMS Collaborations. 2023-09-07. Evidence for the Higgs boson decay to a $Z$ boson and a photon at the LHC. https://doi.org/10.1103/physrevlett.132.021803

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