Measurement of the Wγ Production Cross Section in Proton-Proton Collisions at s =13 TeV and Constraints on Effective Field Theory Coefficients

Physical Review Letters 2021
Viesturs Veckalns

A fiducial cross section for Wγ production in proton-proton collisions is measured at a center-of-mass energy of 13 TeV in 137 fb-1 of data collected using the CMS detector at the LHC. The W→eν and μν decay modes are used in a maximum-likelihood fit to the lepton-photon invariant mass distribution to extract the combined cross section. The measured cross section is compared with theoretical expectations at next-to-leading order in quantum chromodynamics. In addition, 95% confidence level intervals are reported for anomalous triple-gauge couplings within the framework of effective field theory.

DOI
10.1103/PhysRevLett.126.252002
Hyperlink
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.252002

CMS Collaboration, A.M.Sirunyan, A.Tumasyan, V.Veckalns ... [et al.], V. Measurement of the Wγ Production Cross Section in Proton-Proton Collisions at s =13 TeV and Constraints on Effective Field Theory Coefficients. Physical Review Letters, 2021, Vol. 126, No. 25, Article number 252002. ISSN 0031-9007. e-ISSN 1079-7114. Pieejams: doi:10.1103/PhysRevLett.126.252002

Publication language
English (en)