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

The first evidence is presented for the Higgs boson decay to a $Z$ boson and a photon, 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 $140\,\mathrm{fb^{-1}}$ for each experiment, at a center-of-mass energy of $13\,\mathrm{TeV}$. The measured signal rate, relative to the Standard Model prediction, is $2.2\pm0.7$, and agrees with the theoretical expectation within 1.9 standard deviations.