Abstract
A limit on the tau neutrino mass Mντ is obtained from a study of tau decays in the reaction e+e-→τ+τ- at center-of-mass energies ∼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 τ-→3h- 2h+ντ and τ-→2h-h+2π0ντ. The data sample used in this analysis contains 1.77×106 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 Mντ. The limit obtained for both five-hadron modes together is 32.6 MeV at 95% C.L.
Original language | English (US) |
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Pages (from-to) | 3700-3704 |
Number of pages | 5 |
Journal | Physical review letters |
Volume | 70 |
Issue number | 24 |
DOIs | |
State | Published - 1993 |