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arXiv · hep-ex/9811002

Limits on the Mass of the Tau Neutrino from CLEO

Jean E. Duboscq
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Abstract

A limit on the mass of the tau neutrino is derived from 4.5x10^6 tau pairs produced at a center of mass energy of 10.6 GeV. The measurement technique involves a two-dimensional extended likelihood analysis, including the dependence of the end-point population on the tau neutrino mass, and allows for the first time an explicit background contribution. We use the decays of the tau to five charged pions and a neutrino and to 3 charged pions, 2 neutral pions and a neutrino to obtain an upper limit of 30 MeV, as well as a preliminary limit of 31 MeV from the decay of a tau to 3 charged hadrons, a neutral pi and a neutrino.

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Jean E. Duboscq. 1998-11-02. Limits on the Mass of the Tau Neutrino from CLEO. https://doi.org/10.1016/s0920-5632(99)00499-5

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