Garra Ticó, JordiGraugés Pous, EugeniBABAR Collaboration2019-09-202019-09-202005-01-140031-9007https://hdl.handle.net/2445/140648A search for the nonconservation of lepton flavor number in the decay tau -> mu gamma has been performed using 2.07 x 10^8 e+e- -> tau+ tau- events produced at a center-of-mass energy near 10.58 GeV with the BABAR detector at the PEP-II storage ring. We find no evidence for a signal and set an upper limit on the branching ratio of BR(tau -> mu gamma) < 6.8 x 10^-8 at 90% confidence level.7 p.application/pdfeng(c) American Physical Society, 2005Física de partículesExperimentsParticle physicsExperimentsinfo:eu-repo/semantics/article5390822019-09-20info:eu-repo/semantics/openAccess