Constraints on anomalous charged current couplings, tau neutrino mass and fourth generation mixing from tau leptonic branching fractions

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 $\eta$ 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.

Invited talk at the TAU'98 Workshop, 14-17 September 1998, Santander, Spain (presented by John SWAIN)

References in corpus (5)

• Search For Charged Higgs Decays of the Top Quark Using Hadronic Decays of the Tau Lepton
• An upper limit on the anomalous magnetic moment of the τlepton
• Radiative Tau Lepton Pair Production as a Probe of Anomalous Electromagnetic Couplings of the Tau
• The tan(beta) - M_H^\pm bound from inclusive semi-tauonic B-decays in the MSSM
• Numerical Construction of Likelihood Distributions and the Propagation of Errors

Cited by in corpus (6)

• An MSSM Extension with a Mirror Fourth Generation, Neutrino Magnetic Moments and LHC Signatures
• Simultaneous Extraction of the Fermi constant and PMNS matrix elements in the presence of a fourth generation
• Large Tau and Tau Neutrino Electric Dipole Moments in Models with Vector Like Multiplets
• On the Possible Observation of Mirror Matter
• A Measurement of the tau -> mu nu nu Branching Ratio
• A measurement of the tau to mu nu nu branching ratio