Limit on Tau Neutrino Mass from τ⁻to π⁻π⁺π⁻π⁰ν_(τ)
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✦ hep-ex
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limitmassneutrinocleoconfidencedatadecaysderive
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From a data sample of 29058 $\tau^\pm\to\pi^\pm\pi^+\pi^-\pi^0\nu_\tau$ decays observed in the CLEO detector we derive a 95% confidence upper limit on the tau neutrino mass of 28 MeV.
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