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

Abstract

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.

arXiv comment14 pages, 8 figures submitted to Nuclear Physics B

References in corpus (2)

• Improved Bounds on the Electromagnetic Dipole Moments of the Tau Lepton
• Constraints on Fermion Magnetic and Electric Moments from LEP-I

Cited by in corpus (7)

• Model independent bounds on the tau lepton electromagnetic and weak magnetic moments
• Observation of the $\gamma \gamma \to \tau \tau$ process in Pb+Pb collisions and constraints on the $\tau$-lepton anomalous magnetic moment with the ATLAS detector
• Limits on the Dipole Moments of the $\tau$-Lepton via the Process $e^{+}e^{-}\to τ^+ τ^- γin a Left-Right Symmetric Model
• Anomalous Magnetic and Electric Dipole Moments of the Tau
• Constraints on anomalous charged current couplings, tau neutrino mass and fourth generation mixing from tau leptonic branching fractions
• Electromagnetic and Weak Moments of the Tau-Lepton
• Bounds on the Tau Magnetic Moments: Standard Model and Beyond