Abstract

We use recent experimental measurements of tau branching fractions to determine the weak charged current magnetic and electric dipole moments of the tau and the Michel parameter η with unprecedented precision. These results are then used to constrain the tau compositeness scale and the allowed parameter space for Higgs doublet models. We also present new constraints on the mass of the tau neutrino and its mixing with a fourth generation neutrino.

Notes

Originally posted at http://arxiv.org/abs/hep-ph/9811209v1. Preprint of an article published in Nuclear Physics B - Proceedings Supplements, v.76 no.1-3, 1999. Invited talk at the TAU’98 Workshop, 14-17 September 1998, Santander, Spain.

Keywords

tau leptonic functions, tau neutrino mass, high energy physics phenomenology, Michel parameter

Subject Categories

Phenomenological theory (Physics), Couplings, Neutrinos, Branching fractions (Nuclear physics), Dipole moments

Disciplines

Physics

Publication Date

1999

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