Measuring WWZ and WWγ coupling constants with Z0-pole data

Triple gauge boson couplings between Z0, γ and the W boson are determined by exploiting their impact on radiative corrections to fermion-pair production in e+e− interactions at centre-of-mass energies near the Z0-pole. Recent values of observables in the electroweak part of the Standard Model are used to determine the four parameters ϵ1, ϵ2, ϵ3 and ϵb. In a second step the results on the four ϵ parameters are used to determine the couplings Δg1Z and Δκγ. For a wide range of scales, these indirect coupling measurements are more precise than recent direct measurements at LEP-2 and at the TEVATRON. The Standard Model predictions agree well with these measurements.