22-28 July 2010
Palais des Congrès de Paris
Europe/Paris timezone

Search for lepton flavour violating tau decay and lepton-number violation B decay at Belle

23 Jul 2010, 09:45
13m
Salle 242A ()

Salle 242A

Parallel Session Talk 06 - CP violation, CKM and Rare Decays 06 - CP violation, CKM and Rare Decays

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.

Primary author

Presentation Materials