Journal article
Measurement of the branching fraction of the radiative decay τ̄ → μ̄ν̄μντγ
G Alexander, J Allison, N Altekamp, K Ametewee, KJ Anderson, S Anderson, S Arcelli, S Asai, D Axen, G Azuelos, AH Ball, E Barberio, RJ Barlow, R Bartoldus, JR Batley, J Bechtluft, C Beeston, T Behnke, AN Bell, KW Bell Show all
Physics Letters Section B Nuclear Elementary Particle and High Energy Physics | ELSEVIER SCIENCE BV | Published : 1996
Abstract
The branching ratio of the radiative τ decay τ̄ → μ̄ν̄μντγ has been measured using data collected with the OPAL detector at LEP. The result is B(τ̄ → μ̄ν̄μντγ) = (3.0 ± 0.4 ± 0.5) × 10-3 for photon energies above 20 MeV measured in the τ rest frame. The result is in good agreement with the Standard Model expectation.