Evidence for the Higgs Boson Decay to a Z Boson and a Photon at the LHC

Summary, in English

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 datasets 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±0.7 times the standard model prediction, and agrees with the theoretical expectation within 1.9 standard deviations.

• Author: G. Aad; T.P.A. Åkesson; C. Doglioni; V. Hedberg; H. Herde; B. Konya; E. Lytken; R. Poettgen; N.D. Simpson; O. Smirnova; I. Zhizhin; A. Zhokin
• Department/s: Particle and nuclear physics; eSSENCE: The e-Science Collaboration; Department of Physics
• Publishing year: 2024
• Language: English
• Publication/Series: Physical Review Letters
• Volume: 132
• Issue: 2
• Links: http://dx.doi.org/10.1103/PhysRevLett.132.021803
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Subatomic Physics
• Keywords: article; boson; controlled study; human; major clinical study; photon
• Status: Published
• ISBN/ISSN/Other: ISSN: 1079-7114