Radiative Tau Lepton Pair Production as a Probe of Anomalous Electromagnetic Couplings of the Tau

Details Radiative Tau Lepton Pair Production as a Probe of Anomalous Electromagnetic Couplings of the Tau Radiative Tau Lepton Pair Production as a Probe of Anomalous Electromagnetic Couplings of the Tau

1997-12-12

arxiv.org/abs/hep-ph/9712360v1

Nucl.Phys.B523:439-449,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 8 figures submitted to Nuclear Physics B

Scientific paper

10.1016/S0550-3213(98)00121-7

We calculate the squared matrix element for the process e+ e- --> tau+ tau- gamma allowing for anomalous magnetic and electric dipole moments at the tau tau gamma vertex. No interferences are neglected and no approximations of light fermion masses are made. We show that anomalous 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 is significant compared to the contribution from anomalous amplitudes alone. A program to perform the calculation is available and it may be employed as a Monte Carlo generator.

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