ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2005, vol. 613, p. 20-28
Search for τ → eγ decay at Belle
We have searched for the lepton-flavor-violating decay τ→eγ using a data sample of 86.7 fb -1 collected with the Belle detector at the KEKB asymmetric e +e - collider. No evidence for a signal is obtained, and we set an upper limit for the branching fraction B(τ→eγ)<3.9×10 -7 at the 90% C.L. © 2005 Elsevier B.V. All rights reserved.