Constraints on the tau neutrino mass and mixing from precise measurements of tau decay rates

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dc.creatorSwain, John
dc.creatorTaylor, Lucas
dc.date1996-10-04
dc.date.accessioned2026-07-07T10:33:23Z
dc.date.available2026-07-07T10:33:23Z
dc.descriptionWe have derived constraints on the tau neutrino mass and fourth generation mixing from an analysis of the partial widths of tau lepton decays, in particular: tau -> e nu nu_tau, tau -> mu nu nu_tau, tau -> pi nu_tau, tau -> K nu_tau. We present predictions for the tau decay widths, allowing for a non-zero tau neutrino mass, m(nu_tau), and for mixing with a neutrino of mass m(nu_L) > M_Z/2, which is parametrised using a Cabibbo-like mixing angle, theta_L. By comparison of these theoretical predictions with the experimental measurements, we obtain the following bounds at the 90% confidence level: m(nu_tau) < 42 MeV and sin^2(theta_L) < 0.014.
dc.description11 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/hep-ph/9610242
dc.identifierhttp://arxiv.org/abs/hep-ph/9610242
dc.identifierPhys.Rev.D55:1-4,1997
dc.identifierdoi:10.1103/PhysRevD.55.1
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/179092
dc.subjectHigh Energy Physics - Phenomenology
dc.titleConstraints on the tau neutrino mass and mixing from precise measurements of tau decay rates
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