Study of Triple-Gauge-Boson Couplings ZZZ, ZZgam and Zgamgam at LEP

Details Study of Triple-Gauge-Boson Couplings ZZZ, ZZgam and Zgamgam at LEP Study of Triple-Gauge-Boson Couplings ZZZ, ZZgam and Zgamgam at LEP

2007-06-19

arxiv.org/abs/0706.2741v1

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.

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