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

Авторы: Boos E., Bunichev V., Dubinin M., Dudko L., Ershov A.A., Gribushin A., Klyukhin V., Kodolova O., Lukina O., Petrushanko S., Savrin V., CMS Collaboration
Журнал: Physical Review D
Том: 112
Год издания: 2025
Издательство: American Physical Society
Местоположение издательства: United States
Первая страница: 012009
DOI: 10.1103/cm24-665b
Аннотация: A measurement of the WZγ 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 √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+-νl+l−, where l = e or μ, accompanied by an additional photon. The observed (expected) significance of the WZγ 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 and on the production cross sections of massive axionlike particles.
Добавил в систему: Клюхин Вячеслав Иванович

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