CMS-PAS-SMP-22-018

CMS-PAS-SMP-22-018
Measurement of $\mathrm{WZ}\gamma$ production and constraints on new physics scenarios in proton-proton collisions at $\sqrt{s}=$ 13 TeV
CMS Collaboration
23 July 2024

Abstract: A measurement of the $\mathrm{WZ}\gamma$ triboson production predicted by the standard model is reported. The analysis uses a data sample of proton-proton collisions at a center-of-mass energy of $\sqrt{s}=$ 13 TeV recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 138 fb $^{-1}$ . The analysis uses the final state containing three charged leptons, $\mathrm{WZ}\rightarrow\ell\nu\ell'\ell'$ , where $\ell, \ell' = \mathrm{e}$ or $\mu$ , plus an additional photon. The observed (expected) significance of the $\mathrm{WZ}\gamma$ signal is 5.4 (3.8) standard deviations. The cross section is measured in a fiducial region to be 5.48 $\pm$ 1.11 fb, which can be compared with the prediction of 3.69 $\pm$ 0.15 $\ (\mathrm{PDF}) \pm 0.19\ (\mathrm{scale})$ fb at next-to-leading order in quantum chromodynamics. Exclusions limits at the 95% confidence level are placed on anomalous quartic gauge couplings and on the production of massive axion-like particles.
Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to PRD. The superseded preliminary plots can be found here.

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