A measurement of the Michel parameters in leptonic decays of the tau

We have measured the spectral shape Michel parameters ρ and η using leptonic decays of the τ, recorded by the CLEO II detector. Assuming e-μ universality in the vectorlike couplings, we find ρeμ = 0.735 ± 0.013 ± 0.008 and ηeμ = -0.015 ± 0.061 ± 0.062, where the first error is statistical and the se...

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Bibliographic Details
Main Authors:	Ammar, R, Baringer, P, Bean, A, Besson, D, Coppage, D, Darling, C, Davis, R, Hancock, N, Kotov, S, Kravchenko, I, Kwak, N, Anderson, S, Kubota, Y, Lattery, M, ONeill, J, Patton, S, Poling, R, Riehle, T, Savinov, V, Smith, A, Alam, MS, Athar, S, Ling, Z, Mahmood, A, Severini, H
Format:	Journal article
Published:	1997

A measurement of the Michel parameters in leptonic decays of the tau

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