article · Physical Review Letters
Researchers have identified the first evidence of the Higgs boson decaying into a Z boson and a photon. This observation achieved a statistical significance of 3.4 standard deviations, providing strong indications of this rare subatomic process. The findings originate from a joint analysis combining data from both the ATLAS and CMS experiments at the CERN Large Hadron Collider. The underlying dataset was gathered during proton-proton collisions between 2015 and 2018 at a centre-of-mass energy of 13 TeV, with each experiment contributing roughly 140 inverse femtobarns of integrated luminosity. The measured signal yield was found to be 2.2 plus or minus 0.7 times the rate predicted by the standard model of particle physics. This observed rate is consistent with theoretical expectations within 1.9 standard deviations, establishing an important baseline for understanding rare particle interactions.
Observing rare decay modes of the Higgs boson provides a critical test of the standard model, the established framework describing fundamental particles and their interactions. Finding evidence for this particular decay channel helps physicists confirm theoretical predictions about how the Higgs boson couples to other force-carrying particles, while identifying whether measurements deviate from expectations.
The abstract does not indicate an application pathway.
AI-generated from the published abstract. Always read the original work before citing.
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.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1103/physrevlett.132.021803
Is something wrong with this record? Report it or request removal.
Discussion
Have you built on this work, tried to replicate it, or seen it applied in practice? Share what you know. Verified researchers and MARATTO™ domain experts can open a discussion, and any member can reply. Contributions are reviewed before they appear.
No discussion yet. Open the first thread.
New to MARATTO™? Create a free account.
