Predictions for Anomalous tau+ tau- gamma Production at LEP 1

1996/10/22 by Jochen Biebel, Tord Riemann
Physics and Astronomy · #hep-ph

paper · pdf

published as Z.Phys. C76 (1997) 53-58 · 13 pages, LaTex, 5 figures

arxiv created 1996/10/22 · arxiv updated 2009/11/30

Abstract

We calculate distributions for tau+ tau- gamma production at LEP 1 taking into account a potentially existing anomalous magnetic moment a_tau of the tau lepton. The existing upper limits for |a_tau| are known from the dependence of the decay Z -> tau+ tau- gamma on (a_tau)² and are of the order of (1 - 5)%. We show that such limits are also sensitive to linear terms in a_tau, which are of equal importance at |a_tau| ~ (1 - 2)% and dominate below this value. Contributions from an electric dipole moment d_tau do not interfere with the electromagnetic vertex or with the anomalous magnetic moment. Appropriate formulae are derived.

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