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.
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
Permanent URL
Recommended Citation
Dova, Maria Teresa; Swain, John; and Taylor, Lucas, "Constraints on anomalous charged current couplings, tau neutrino mass and fourth generation mixing from tau leptonic branching fractions" (1999). Physics Faculty Publications. Paper 70. http://hdl.handle.net/2047/d20000423
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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.