Search for tau -> gamma mu: A test of lepton number conservation
Ammar, Raymond G.
Baringer, Philip S.
Davis, Robin E. P.
AMERICAN PHYSICAL SOC
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A search for the lepton number violating decay of the tau lepton to the gammamu final state has been performed with the CLEO II detector at the Cornell e+e- storage ring CESR. In a data sample that corresponds to an integrated luminosity of 1.55 fb-1, we observe no candidates in the signal region. We thus determine an upper limit of B (tau- --> gammamu-) < 4.2x10(-6) at 90% confidence level.
BEAN, A, GRONBERG, J, et al. Search for tau -> gamma mu: A test of lepton number conservation. PHYSICAL REVIEW LETTERS. January 1993. 70(2) : 138-142
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