$B \to D^{(*)} \tau \nu$ at Belle

TL;DR

This paper reports on the study of semileptonic B meson decays to tau leptons at Belle, highlighting their significance in testing models with extended Higgs sectors despite experimental challenges.

Contribution

First detailed analysis of semitauonic B decays at Belle, providing insights into potential new physics beyond the Standard Model.

Findings

Results support or constrain extended Higgs sector models

Improved measurements of B to D(*) tau nu decays

Experimental techniques for tau lepton detection

Abstract

Semileptonic decays of $B$ mesons to the tau lepton, despite of experimental difficulties, are of great importance. In particular they are sensitive probes of models with extended Higgs sectors. The results of studies of semitauonic B decays at Belle are presented.