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Cascade leptonic decays of D and F mesons and possible bounds on the. nu. /sub tau/ mass

Amy Berkov, T.A. Lomonosova, Yu. P. Nikitin, V. A. Khoze

Abstract

It is shown that the upper limit on the tau-neutrino mass can be decreased significantly by analyzing the energy spectra of secondary leptons (electrons and muons) from cascade decays of D/sup + -/ and F/sup + -/ mesons produced in e/sup +/e/sup -/ annihilation via the channels D/sup + -/(F/sup + -/) ..-->..tau/sup + -/ +..nu../sub tau/(nu-bar/sub tau/) and tau/sup + -/..-->..1/sup + -/+..nu../sub 1/(nu-bar/sub 1/)+nu-bar/sub tau/(..mu../sub tau/). The cascade decay of the D meson is the most suitable for this purpose.

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Available abstract

Key concepts: Physics, Muon, Lepton, Meson, Annihilation, Particle physics, Neutrino, Nuclear physics