Observation of WZγ production and constraints on new physics scenarios in proton-proton collisions at √s=13 TeV

(CMS Collaboration) Chekhovsky, V.; Giljanović, Duje; Godinović, Nikola; Lelas, Damir; Šćulac, Ana; Kovač, Marko; Petković, Andro; Šćulac, Toni; Bargassa, Pedrame; Brigljević, Vuko; Chitroda, Bhakti Kanulal; Ferenček, Dinko; Jakovčić, Krešimir; Starodumov, Andrey; Šuša, Tatjana; Mishra, Saswat; Roguljić, Matej; Druzhkin, D. (2025) Observation of WZγ production and constraints on new physics scenarios in proton-proton collisions at √s=13 TeV. Physical review D, 112 (1). ISSN 2470-0029

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Abstract

A measurement of the WZ gamma triboson production cross section is presented. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of root s = 13 TeV recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 138 fb(-1). The analysis focuses on the final state with three charged leptons, l(+/-)nu l(+)l(-), where l = e or mu, accompanied by an additional photon. The observed (expected) significance of the WZ gamma signal is 5.4 (3.8) standard deviations. The cross section is measured in a fiducial region, where events with an l originating from a tau lepton decay are excluded, to be 5.48 +/- 1.11 fb, which is compatible with the prediction of 3.69 +/- 0.24 fb at next-to-leading order in quantum chromodynamics. Exclusion limits are set on anomalous quartic gauge couplings

Item Type:	Article
Uncontrolled Keywords:	High energy physics ; Experimental particle physics ; LHC ; CMS
Subjects:	NATURAL SCIENCES > Physics > Physics of Elementary Particles and Fields
Divisions:	Centre for detectors, sensors and electronics Division of Experimental Physics
Depositing User:	Lorena Palameta
Date Deposited:	22 Jan 2026 11:21
URI:	http://fulir.irb.hr/id/eprint/11051
DOI:	10.1103/cm24-665b

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