Upper Limit on the Tau-Neutrino Mass

S. Abachi,C. Akerlof,P. Baringer,I. Beltrami,D. Blockus,G. Bonvicini,B. Brabson,B. G. Bylsma,J. Chapman,B. Cork,R. DeBonte,M. Derrick,D. Errede,K. K. Gan,S. W. Gray,N. Harnew,C. Jung,P. Kesten,D. Koltick,P. Kooijman,F.J. Loeffler,J.S. Loos,E. H. Low,R. L. McIlwain,D. I. Meyer,D. H. Miller,B. Musgrave,H. Neal,D. Nitz,C. R. Ng,H. Ogren,L. E. Price,L. K. Rangan,D. R. Rust,J. Schlereth,A.A. Seidl,E. I. Shibata,K. Sugano,R. P. Thun,T. Trinko,M. Valdata-Nappi,J. M. Weiss,M. Willutzky,D. E. Wood

Upper Limit on the Tau-Neutrino Mass

1986

A sample of tau-lepton decays to 5..pi../sup + -/..nu../sub tau/ and 5..pi../sup + -/..pi../sup 0/..nu../sub tau/, observed in the high-resolution spectrometer at the SLAC e/sup +/e/sup -/ storage ring PEP, have been used to place an upper limit on the mass of the tau neutrino of 84 MeV/c/sup 2/ at the 95% confidence level.

Keywords:

Tau neutrino
Pair production
Mass spectrum
Lepton
Pion
Nuclear physics
Electron–positron annihilation
Neutrino
Physics
Spectrometer
Hadron
Particle decay
Particle physics
Semileptonic decay

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