Limit on the tau neutrino mass
Ammar, Raymond G.
Baringer, Philip S.
Davis, Robin E. P.
AMERICAN PHYSICAL SOC
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A limit on the tau neutrino mass M(nu)tau is obtained from a study of tau decays in the reaction e+e- --> tau+tau- at center-of-mass energies is similar to 10.6 GeV. The result is based on an end-point analysis of the invariant mass spectrum of the decay products in the decay modes tau- --> 3h-2h+nu(tau), and tau- --> 2h-h+2pi0nu(tau). The data sample used in this analysis contains 1.77 x 10(6) tau pairs, corresponding to an integrated luminosity of 1.92 fb-1, and is substantially larger than previous data samples used to place a limit on M(nu)tau. The limit obtained for both five-hadron modes together is 32.6 MeV at 95% C.L.
CINABRO, D, HENDERSON, S, et al. Limit on the tau neutrino mass. PHYSICAL REVIEW LETTERS. June 1993. 70(24) : 3700-3704
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