Measuring WWZ and WWgamma coupling constants with Z-pole data

Details Measuring WWZ and WWgamma coupling constants with Z-pole data Measuring WWZ and WWgamma coupling constants with Z-pole data

1999-02-11

arxiv.org/abs/hep-ph/9902317v2

Phys.Lett. B461 (1999) 149-154

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 2 tables, 4 figures

Scientific paper

10.1016/S0370-2693(99)00815-1

Triple gauge boson couplings between Z, gamma 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 Z-pole. Recent values of observables in the electroweak part of the Standard model are used to determine the four parameters epsilon_1, epsilon_2, epsilon_3 and epsilon_b. In a second step the results on the four epsilon parameters are used to determine the couplings Delta-g^1_Z and Delta-kappa_gamma. 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.

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