Search for lepton flavor violating τ- decays with a KS0 meson

We have searched for the lepton flavor violating decays tau(-) l-K-S(0) (l = e or mu), using a data sample of 281 fb(-1) collected with the Belles detector at the KEKB e(+)e(-) asymmetric-energy collider. No evidence for a signal was found in either of the decay modes, and we set the following upper limits for the branching fractions: B(tau(-) -> e-K-S(0)) < 5.6 x 10(-8) and B(tau(-) -> K-S(O)) < 4.9 x 10(-8) at the 90% confidence level. These results improve the previously published limits set by the CLEO Collaboration by factors of 16 and 19, respectively. (c) 2006 Elsevier B.V. All rights reserved.