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

Sirunyan, A. M.; Brochero Cifuentes, Javier Andrés; Cabrillo Bartolomé, José Iban; Calderón Tazón, Alicia; Chazin Quero, Bárbara; Duarte Campderros, Jorge; Fernández García, Marcos; Fernández Madrazo, Celia; Fernández Manteca, Pedro José; García Alonso, Andrea; Gómez Gramuglio, Gervasio; Martínez Rivero, Celso; Martínez Ruiz del Árbol, Pablo; Matorras Weinig, Francisco; Piedra Gómez, Jonatan; Prieëls, Cedric; Ricci-Tam, Francesca Shun-Ning Annarosa; Rodrigo Anoro, Teresa; Ruiz Jimeno, Alberto; Scodellaro, Luca; Trevisani, Nicolo; Vila Álvarez, Iván; Vizán García, Jesús Manuel

doi:10.1103/PhysRevLett.126.252002

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Identificadores

URI: http://hdl.handle.net/10902/24708

DOI: 10.1103/PhysRevLett.126.252002

ISSN: 0031-9007

ISSN: 1079-7114

; [et al.]

Fecha

2021-06-25

Derechos

Publicado en

Physical Review Letters, 2021, 126, 252002

Editorial

American Physical Society

Enlace a la publicación

https://doi.org/10.1103/PhysRevLett.126.252002

Resumen/Abstract

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.

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