We present herein new results from Belle on the $\tau^- \rightarrow \pi^- \nu_{ \rm \tau} \ell^+ \ell^- $ branching fraction and from BABAR on the $\tau^- \rightarrow K^- (0,1,2,3) \pi^0 \nu_{ \rm \tau}$, $\tau^- \rightarrow \pi^- (3,4) \pi^0 \nu_{ \rm \tau}$ and $\tau^- \rightarrow K^- K^0_{ \rm S} \nu_{ \rm \tau}$ branching fractions. From the $K^- K^0_{ \rm S}$ mass spectrum we determine the spectral function. The improved branching fraction measurements of the $\tau^- \rightarrow K^- (0,1,2,3) \pi^0 \nu_{ \rm \tau}$ decays are used to determine $|V_{ \rm us}|$ from $\tau^- \rightarrow X_{ \rm s}^- \nu_{ \rm \tau}$ inclusive decays.
Categories: hep-ex