Measurement of the τ-lepton mass

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Abstract

Using data from the CLEO II detector at CESR, we measure the τ-lepton mass by exploiting the unique kinematics of events in which both τ's decay hadronically. The result is mτ=1777.8±0.7±1.7 MeV/c2. By comparing our result with other measurements near τ-pair threshold, we extract an upper limit on the τ-neutrino mass of 75 MeV/c2 at 95% confidence level. © 1993 The American Physical Society.

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Balest, R., Daoudi, M., Ford, W. T., Johnson, D. R., Lingel, K., Lohner, M., … Yang, S. (1993). Measurement of the τ-lepton mass. Physical Review D, 47(9). https://doi.org/10.1103/PhysRevD.47.R3671

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