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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

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; Cali, Ivan Amos; Demiragli, Zeynep; Di Matteo, Leonardo; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hsu, Dylan George; Iiyama, Yutaro; Innocenti, Gian Michele; Klute, Markus; Kovalskyi, Dmytro; Krajczar, Krisztian F.; Lai, Yue Shi; Lee, Yen-Jie; Levin, Amy Elizabeth; Luckey Jr, P David; Marini, Andrea Carlo; McGinn, Christopher Francis; Mironov, Camelia Maria; Narayanan, Siddharth Madhavan; Niu, Xinmei; Paus, Christoph M. E.; Roland, Christof E; Roland, Gunther M; Salfeld-Nebgen, Jakob Maxillian Henry; Stephans, George S. F.; Sumorok, Konstanty C; Tatar, Kaya; Varma, Mukund Madhav; Velicanu, Dragos Alexandru; Veverka, Jan; Wang, Jing; Wang, Ta-Wei; Wyslouch, Boleslaw; Yang, Ming; Wyslouch, Victoria; ... Show more Show less
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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
Date issued
2017-05
URI
http://hdl.handle.net/1721.1/119228
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
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
ISSN
0370-2693

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