RADIATIVE TAU-LEPTON PAIR PRODUCTION AS A PROBE OF ANOMALOUS ELECTROMAGNETIC COUPLINGS OF THE TAU

We calculate the squared matrix element for the process e(+)e(-) --> t au(+)tau(-)gamma allowing for anomalous magnetic and electric dipole m oments at the tau tau gamma vertex, No interferences are neglected and no approximations of light fermion masses are made. We show that anom alous moments affect not only the cross section, but also the shape of the photon energy and angular distributions, We also demonstrate that in the case of the anomalous magnetic dipole moment, the contribution from interference involving Standard Model and anomalous amplitudes i s significant compared to the contribution from anomalous amplitudes a lone. A program to perform the calculation is available and it may be employed as a Monte Carlo generator. (C) 1998 Elsevier Science B.V.