Aad G.Abbott B.Abeling K.Abicht N.J.Abidi S.H.Aboulhorma A.Abramowicz H.2024-03-092024-03-0920240031-9007https://doi.org/10.1103/PhysRevLett.132.021803https://hdl.handle.net/20.500.14034/1594The first evidence for the Higgs boson decay to a Formula Presented 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 datasets collected at the CERN Large Hadron Collider (LHC) from 2015 to 2018. These correspond to integrated luminosities of around Formula Presented for each experiment, at a center-of-mass energy of 13 TeV. The measured signal yield is Formula Presented times the standard model prediction, and agrees with the theoretical expectation within 1.9 standard deviations. © 2024 CERN, for the ATLAS and CMSs Collaboration.eninfo:eu-repo/semantics/openAccessBosons; Large datasets; Statistics; A-center; Combined analysis; Higgs Boson decay; Integrated luminosity; Large Hadron Collider; Large-hadron colliders; Proton proton collisions; Standard deviation; Statistical significance; Z Bosons; Photons; article; boson; controlled study; human; major clinical study; photonArticle10.1103/PhysRevLett.132.02180313222-s2.0-8518224684938277607Q1