2020 Impact factor 4.590
Particles and Fields

Eur. Phys. J. C 19, 1-14
DOI: 10.1007/s100520100597

Measurement of triple gauge boson couplings from W+W- production at LEP energies up to 189 GeV

The OPAL Collaboration
G. Abbiendi2and et al.

2 Dipartimento di Fisica dell' Università di Bologna and INFN, 40126 Bologna, Italy

(Received: 24 August 2000 / Published online: 23 February 2001 -© Springer-Verlag 2001)

A measurement of triple gauge boson couplings is presented, based on W-pair data recorded by the OPAL detector at LEP during 1998 at a centre-of-mass energy of 189 GeV with an integrated luminosity of 183 pb-1. After combining with our previous measurements at centre-of-mass energies of 161-183 GeV we obtain $\kappa=0.97_{-0.16}^{+0.20}$, gz1=0.991+0.060-0.057 and $\lambda=-0.110_{-0.055}^{+0.058}$, where the errors include both statistical and systematic uncertainties and each coupling is determined by setting the other two couplings to their Standard Model values. These results are consistent with the Standard Model expectations.

© Società Italiana di Fisica, Springer-Verlag 2001