Measurement of the branching fractions and mass spectra for $τ$ lepton decays including $K_{S}^{0}$ at Belle

Abstract

We report a study of $τ$ lepton decays involving $\Ks$ with a 669 fb$^{-1}$ data sample accumulated with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. The branching fractions have been measured for the $\tauTO \piKs ν_τ$, $\KKs ν_τ$, $\piKspizero ν_τ$, $\KKspizero ν_τ$, $\piKsKs ν_τ$ and $\piKsKspizero ν_τ$ decays. We also provide the unfolded mass spectra for $\tauTO \piKspizero ν_τ$ and $\tauTO \KKspizero ν_τ$.

3 figures, Proceeding of Tau2012, the 12th international workshop on tau lepton physics Nagoya, Japan, 17-21 September, 2012