# Search for Lepton Flavor and Lepton Number Violating tau Decays into a Lepton and Two Charged Mesons - High Energy Physics - Experiment

Abstract: We search for lepton flavor and lepton number violating tau decays into alepton ell = electron or muon and two charged mesons h,h- = pi^\pm orK^\pm, tau-> ell-h+h- and tau-> ell+h-h-, using 671 fb^{-1} of datacollected with the Belle detector at the KEKB asymmetric-energy e+e- collider.We obtain 90% C.L. upper limits on the branching fractions in the range4.4-8.8x10^{-8} for tau -> ehh-, and 3.3-16x10^{-8} for tau -> muhh-processes. These results improve upon previously published upper limits byfactors between 1.6 to 8.8.

Author: Y.Miyazaki, et al. The Belle Collaboration

Source: https://arxiv.org/