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

CollaborationWith : Akilli, Ece / Ancu, Lucian Stefan / Benoit, Mathieu / Calace, Noemi / Clark, Allan Geoffrey / Coccaro, Andrea / Della Volpe, Domenico / Di Bello, Francesco / Dubreuil, Arnaud / Ferrere, Didier / Golling, Tobias / Gonzalez Sevilla, Sergio / Iacobucci, Giuseppe / Jansky, Roland / Katre, Akshay / Khoo, Teng Jian / Lanfermann, Marie Christine / Lionti, Anthony Eric / March Ruiz, Luis / Mermod, Philippe / Nackenhorst, Olaf / Paolozzi, Lorenzo / Schramm, Steven / Sfyrla, Anna / Valente, Marco / Wu, Xin
Published in European Physical Journal. C. 2017, vol. 77, no. 9, p. 646
Collection Open Access - SCOAP3
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=8TeV 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.
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ATLAS COLLABORATION. Study of WWγ and WZγ production in pp collisions at √s = 8 TeV and search for anomalous quartic gauge couplings with the ATLAS experiment. In: European Physical Journal. C, 2017, vol. 77, n° 9, p. 646. https://archive-ouverte.unige.ch/unige:97177

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Deposited on : 2017-10-02

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