Measurement of the cross section for electroweak production of Z gamma in association with two jets and constraints on anomalous quartic gauge couplings in proton-proton collisions at sqrt(s) = 8 TeV

CMS; Beluffi, Camille; Bondu, Olivier; Brochet, Sébastien; Bruno, Giacomo; Caudron, Adrien; Ceard, Ludivine; de Visscher, Simon; Delaere, Christophe; Delcourt, Martin; Forthomme, Laurent; François, Brieuc; Giammanco, Andrea; Jafari, Abideh; Jez, Pavel; Komm, Matthias; Lemaitre, Vincent; Magitteri, Alessio; Mertens, Alexandre; Musich, Marco

doi:10.1016/j.physletb.2017.04.071

Measurement of the cross section for electroweak production of Z gamma in association with two jets and constraints on anomalous quartic gauge couplings in proton-proton collisions at sqrt(s) = 8 TeV

CMS

;

Beluffi, Camille

;

Bondu, Olivier

;

Brochet, Sébastien

;

Wertz, Sébastien

;et.al.

(2017) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. B770, p. 380-402 (2017)

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Authors

CMSUCLouvain
Author
Beluffi, CamilleUCLouvain
Author
Bondu, OlivierUCLouvain
Author
Brochet, SébastienUCLouvain
Author
Bruno, GiacomoUCLouvain
Author
Caudron, AdrienUCLouvain
Author
Ceard, LudivineUCLouvain
Author
de Visscher, SimonUCLouvain
Author
Delaere, ChristopheUCLouvain
Author
Delcourt, MartinUCLouvain
Author
Forthomme, LaurentUCLouvain
Author
François, BrieucUCLouvain
Author
Giammanco, AndreaUCLouvain
Author
Jafari, AbidehUCLouvain
Author
Jez, PavelUCLouvain
Author
Komm, MatthiasUCLouvain
Author
Lemaitre, VincentUCLouvain
Author
Magitteri, AlessioUCLouvain
Author
Mertens, AlexandreUCLouvain
Author
Musich, MarcoUCLouvain
Author
Nuttens, ClaudeUCLouvain
Author
Piotrzkowski, KrzysztofUCLouvain
Author
Quertenmont, LoïcUCLouvain
Author
Selvaggi, MicheleUCLouvain
Author
Vidal Maroño, MiguelUCLouvain
Author
Wertz, SébastienUCLouvain
Author
et. al.

Abstract

A measurement is presented of the cross section for the electroweak production of a Z boson and a photon in association with two jets in proton-proton collisions at sqrt(s)= 8 TeV. The Z bosons are identified through their decays to electron or muon pairs. The measurement is based on data collected with the CMS detector corresponding to an integrated luminosity of 19.7 inverse femtobarns. The electroweak contribution has a significance of 3.0 standard deviations, and the measured fiducial cross section is 1.86 +0.90/-0.75 (stat)+0.34/-0.26 (syst) +/- 0.05 (lumi) fb, while the summed electroweak and quantum chromodynamic total cross section in the same region is observed to be 5.94 +1.53/-1.35 (stat) +0.43/-0.37 (syst) +/- 0.13 (lumi) fb. Both measurements are consistent with the leading-order standard model predictions. Limits on anomalous quartic gauge couplings are set based on the Z gamma mass distribution.

Affiliations

UCLouvainSST/IRMP - Institut de recherche en mathématique et physique

Citations

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CMS, Beluffi, C., Bondu, O., Brochet, S., Bruno, G., Caudron, A., Ceard, L., de Visscher, S., Delaere, C., Delcourt, M., Forthomme, L., François, B., Giammanco, A., Jafari, A., Jez, P., Komm, M., Lemaitre, V., Magitteri, A., Mertens, A., et al. (2017). Measurement of the cross section for electroweak production of Z gamma in association with two jets and constraints on anomalous quartic gauge couplings in proton-proton collisions at sqrt(s) = 8 TeV. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, B770, 380-402. https://doi.org/10.1016/j.physletb.2017.04.071 (Original work published 2017)