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

CMS Collaboration; Aad, G.; GOMBER, B.; RASTOGI, A.; ATLAS Collaboration; DUBE, SOURABH; ALPANA, A.; LAHA, A.; SHARMA, SEEMA et al.; KANSAL, B.

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

ATLAS Collaboration; CMS Collaboration; Aad, G.; ALPANA, A.; DUBE, SOURABH; GOMBER, B.; KANSAL, B.; LAHA, A.; RASTOGI, A.; SHARMA, SEEMA et al.

URI: https://doi.org/10.1103/PhysRevLett.132.021803 http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/8725 Date: 2024-01

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 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.

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