Precise measurement of B(τ−→K∗0(892)K−ντ), MK∗0(892) and ΓK∗0(892) from Belle

Making full use of a high-statistical data sample of τ decays recorded in the KEKB-Belle experiment, we have largely improved the precision of the branching fraction B ( τ − → K ∗ 0 ( 892 ) K − ν τ ) = ( 1.56 ± 0.02 ± 0.09 ) × 10 − 3 , and measured the mass and width of K ∗ 0 ( 892 ) meson to be ( 895.10 ± 0.27 ± 0.31 ) MeV/c 2 and ( 47.23 ± 0.49 ± 0.79 ) MeV , respectively, with better or similar accuracy of the PDG world average values. The first measurement of τ − → K ∗ 0 ( 892 ) K − π 0 ν τ decay is also accomplished and B ( τ − → K ∗ 0 ( 892 ) K − π 0 ν τ ) = ( 2.39 ± 0.46 ± 0.26 ) × 10 − 5 is obtained. (All results presented here are preliminary.)