Measurement of the Cross Section for Electroweak Production of Zγ in Association with Two Jets and Constraints on Anomalous Quartic Gauge Couplings in Proton–proton Collisions At √s = 8 TeV
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Author(s)
CMS Collaboration
Abercrombie, Daniel Robert
Allen, Brandon Leigh
Apyan, Aram
Barbieri, Richard Alexander
Baty, Austin Alan
Bi, Ran
Bierwagen, Katharina
Brandt, Stephanie Akemi
Busza, Wit
Date Issued
May 2017
Journal
Physics Letters B
Publisher
Elsevier
Citation
Khachatryan, V. et al. “Measurement of the Cross Section for Electroweak Production of Zγ in Association with Two Jets and Constraints on Anomalous Quartic Gauge Couplings in Proton–proton Collisions At √s = 8 TeV.” Physics Letters B 770 (July 2017): 380–402 © 2017 The Authors
Version
Final published version
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 √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 fb⁻¹. The electroweak contribution has a significance of 3.0 standard deviations, and the measured fiducial cross section is 1.86[subscript −0.75][superscript +0.90](stat)[subscript −0.26][superscript +0.34](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[subscript −1.35][superscript +1.53](stat)[subscript −0.37][superscript +0.43](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 Zγ mass distribution. Keywords: CMS; Physics; aQGC; Electroweak production
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1016/J.PHYSLETB.2017.04.071
