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Elsevier, Physics Letters B, 1-2(527), p. 29-38, 2002

DOI: 10.1016/s0370-2693(02)01167-x

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Study of the $W^+W^-γ$ Process and Limits on Anomalous Quartic Gauge Boson Couplings at LEP

Journal article published in 2002 by P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, G. Alemanni, J. Allaby, A. Aloisio, M. G. Alviggi, H. Anderhub, V. P. Andreev, F. Anselmo, A. Arefiev, T. Azemoon, T. Aziz, P. Bagnaia and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

The process e+e- -> W+ W- gamma is studied using the data collected by the L3 detector at LEP. New results, corresponding to an integrated luminosity of 427.4 pb-1 at centre-of-mass energies from 192 GeV to 207 GeV, are presented. The W+W- gamma cross sections are measured to be in agreement with Standard Model expectations. No hints of anomalous quartic gauge boson couplings are observed. Limits at 95% confidence level are derived using also the process e+e- --> nu nubar gamma gamma.