Электронный каталог

Статья

Chekhovsky, V.
Observation of WZ*g Production and Constraints on New Physics Scenarios in Proton-Proton Collisions at *%s=13 TeV / V.Chekhovsky, S.Afanasiev, V.Alexakhin, D.Budkouski, I.Golutvin, I.Gorbunov, V.Karjavine, O.Kodolova, V.Korenkov, N.V.Krasnikov, A.Lanev, A.Malakhov, V.Matveev, A.Nikitenko, V.Palichik, V.Perelygin, S.Polikarpov, M.Savina, V.Shalaev, S.Shmatov, S.Shulha, V.Smirnov, O.Teryaev, N.Voytishin, B.S.Yuldashev, A.Zarubin, I.Zhizhin, Z.Tsamalaidze, [CMS Collab.]. – Text : electronic // Physical Review D. – 2025. – Vol. 112, No. 1. – P. 012009. – URL: https://doi.org/10.1103/cm24-665b. – Bibliogr.: 69.

A measurement of the 𝑊⁢𝑍⁢𝛾 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&sup(−1). The analysis focuses on the final state with three charged leptons, ℓ&sup(±)⁢𝜈⁢ℓ*+⁢ℓ*−, where ℓ =𝑒 or 𝜇, accompanied by an additional photon. The observed (expected) significance of the 𝑊⁢𝑍⁢𝛾 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.



ОИЯИ = ОИЯИ (JINR)2025