Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2007-06-19
Eur.Phys.J.C51:525-542,2007
Physics
High Energy Physics
High Energy Physics - Experiment
31 pages, 10 figures, Accepted by Euro. Phys. J. C
Scientific paper
10.1140/epjc/s10052-007-0345-0
Neutral triple-gauge-boson couplings ZZZ, ZZgam and Zgamgam have been studied with the DELPHI detector using data at energies between 183 and 208 GeV. Limits are derived on these couplings from an analysis of the reactions e+e- -> Zgam, using data from the final states gamma f fbar, with f = q or neutrino, from e+e- -> ZZ, using data from the four-fermion final states q qbar q qbar, q qbar mu+ mu-, q qbar e+ e-, q qbar nu nubar, mu+ mu- nu nubar and e+ e- nu nubar, and from e+e- -> Zgam*, in which the final state gamma is off mass-shell, using data from the four-fermion final states q qbar e+ e- and q qbar mu+ mu-. No evidence for the presence of such couplings is observed, in agreement with the predictions of the Standard Model.
Abdallah Joseph
The DELPHI Collaboration
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