Speaker
Kiyoshi Hayasaka
(Nagoya Univ.)
Description
We present the results of a search for lepton flavor violation (LFV) in tau --> lepton (e or mu) + pseudoscalar (pi0, eta or eta') and in tau --> lepton (e or mu) + a vector meson (rho, omega, phi, K^{*0}, anti-{K}^{*0}) decays using a large data sample accumulated with the Belle detector at the KEKB symmetric-energy e^+e^- collider. The sensitivity to these modes is significantly improved compared to previous experiments. In the Standard Model, lepton-number-violating decays such as B^+ --> D^- l^+ l^+ are strictly forbidden, but they are allowed if Majorana-type neutrinos exist. We present the results of a
search for B^+ --> D^- l^+ l^+ decays with a high-statistics B anti-{B} event sample.
Author
Collaboration BELLE
(KEK)
