Evidence of Wγγ production in pp collisions at √s=8 TeV and limits on anomalous quartic gauge couplings with the ATLAS detector

Georges Aad,Brad Abbott,Jalal Abdallah,S. Abdel Khalek,Ovsat Abdinov,Rosemarie Aben,B. Abi,M. Abolins,Ossama AbouZeid,Halina Abramowicz,Henso Abreu,Ricardo Abreu,Yiming Abulaiti,Bobby Samir Acharya,Leszek Adamczyk,David H. Adams,Jahred Adelman,Stefanie Adomeit,Tim Adye,Tatjana Agatonovic-Jovin,Juan Antonio Aguilar-Saavedra,M. Agustoni,S. P. Ahlen,Faig Ahmadov,Giulio Aielli,Henrik Akerstedt,T. P. A. Åkesson,G. Akimoto,A. V. Akimov,Gian Luigi Alberghi,J. Albert,S. Albrand,M. J. Alconada Verzini,Martin Aleksa,Igor Aleksandrov,Calin Alexa,Gideon Alexander,G. Alexandre,Theodoros Alexopoulos,Muhammad Alhroob,Gianluca Alimonti,Lion Alio,John Alison,Benedict Allbrooke,L. J. Allison,P. P. Allport,Alberto Aloisio,Alejandro Alonso,Francisco Alonso,Cristiano Alpigiani,A. Altheimer,B. Alvarez Gonzalez,Mariagrazia Alviggi,K. Amako,Y. Amaral Coutinho,Christoph Amelung,D. Amidei,S. P. Amor Dos Santos,António Amorim,Simone Amoroso,N. Amram,Glenn Amundsen,Christos Anastopoulos,Lucian Stefan Ancu,Nansi Andari,Timothy Andeen,Christoph Falk Anders,G. Anders,K. J. Anderson,A. Andreazza,V. Andrei,X. S. Anduaga,Stylianos Angelidakis,Ivan Angelozzi,Philipp Anger,Aaron Angerami,Francis Anghinolfi,Alexey Anisenkov,Nuno Anjos,Alberto Annovi,Massimo Antonelli,A. Antonov,J. Antos,F. Anulli,Masato Aoki,L. Aperio Bella,Giorgi Arabidze,Yoshio Arai,Juan Pedro Araque,A. T. H. Arce,Francisco Anuar Arduh,Jean-Francois Arguin,S. Argyropoulos,Metin Arik,Aaron James Armbruster,Olivier Arnaez,V. Arnal,Hannah Arnold,Miguel Arratia,Ozan Arslan

Physical Review Letters（2015）

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Abstract

This Letter reports evidence of triple gauge boson production pp -> W(l nu)gamma gamma + X, which is accessible for the first time with the 8 TeV LHC data set. The fiducial cross section for this process is measured in a data sample corresponding to an integrated luminosity of 20.3 fb(-1), collected by the ATLAS detector in 2012. Events are selected using the W boson decay to e nu or mu nu as well as requiring two isolated photons. The measured cross section is used to set limits on anomalous quartic gauge couplings in the high diphoton mass region.

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