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Properties of the proposed τ charged lepton |
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| Authors: | About ScienceDirect |
| Institution: | a Stanford Linear Accelerator Center, Stanford University, Stanford, California 94305, USA b Lawrence Berkeley Laboratory and Department of Physics, University of California, Berkeley, California 94720, USA |
| Abstract: | The anomalous eμ and 2-prong μx events produced in e+e− annihilation are used to determine the properties of the proposed τ charged lepton. We find the τ mass is 1.90 ± 0.10 GeV/c2; the mass of the associated neutrino, ντ, is less than 0.6 GeV/c2 with 95% confidence; V - A coupling is favored over V + A coupling for the τ − ντ current; and the leptonic branching ratios are 0.186 ± 0.010 ± 0.028 from the eμ events and 0.175 ± 0.027 ± 0.030 from the μx events where the first error is statistical and the second is systematic. |
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