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

Document type: Preprint

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.

General information

Issue date: 1999
Document language: English
Journal: Nuclear Physics B - Proceedings Supplements; vol. 76, no. 1-3
Event: TAU’98 Workshop (Santander, Spain, 14-17 September 1998)
Origin: Facultad de Ciencias Exactas
xmlui.dri2xhtml.METS-1.0.item-dc-subject: leptons ; w boson
Subjects: Ciencias Exactas ; Física

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Created: 17 de septiembre de 2019
Available since: 17 de septiembre de 2019
Please, use one of this identificators(URI) for cite o linking this item:
  • http://sedici.unlp.edu.ar/handle/10915/81405
  • https://doi.org/10.1016/S0920-5632(99)00441-7

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    Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)