B meson decays to multiple-neutrino final states from Belle

초록

B meson decays to multiple-neutrino final states have been studied from energy-asymmetric e+e- collider at or near Upsilon(4S) resonance using the KEKB collider. The data reported here are recorded and analyzed using the Belle detector. In this presentation we show current results on B --> tau nu and B --> D* tau nu decays using te full reconstruction tagging as well as semileptonic tagging in order to enhance signal-to- background ratio. These results are of great interest because they can be potentially affected by new physics effects such as charged Higgs.