Study of WWγ and WZγ production in pp collisions at √s=8 TeV and search for anomalous quartic gauge couplings with the ATLAS experiment. / The ATLAS Collaboration.

In: European Physical Journal C: Particles and Fields, Vol. 77, 646, 09.2017, p. 1-30.

Research output: Contribution to journalArticle

Published

Documents

  • The ATLAS Collaboration

Abstract

This paper presents a study of WWγ and WZγ triboson production using events from proton–proton collisions at a centre-of-mass energy of √s=8 TeV recorded with the ATLAS detector at the LHC and corresponding to an integrated luminosity of 20.2 fb −1. The WWγ production cross-section is determined using a final state containing an electron, a muon, a photon, and neutrinos (eνμνγ). Upper limits on the production cross-section of the eνμνγ final state and the WWγ and WZγ final states containing an electron or a muon, two jets, a photon, and a neutrino (eνjjγ or μνjjγ) are also derived. The results are compared to the cross-sections predicted by the Standard Model at next-to-leading order in the strong-coupling constant. In addition, upper limits on the production cross-sections are derived in a fiducial region optimised for a search for new physics beyond the Standard Model. The results are interpreted in the context of anomalous quartic gauge couplings using an effective field theory. Confidence intervals at 95% confidence level are derived for the 14 coupling coefficients to which WWγ and WZγ production are sensitive.
Original languageEnglish
Article number646
Pages (from-to)1-30
Number of pages30
JournalEuropean Physical Journal C: Particles and Fields
Volume77
Early online date25 Sep 2017
DOIs
Publication statusPublished - Sep 2017
This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

ID: 28878489