We present a preliminary measurement of the B（Ds→μvu） with the Belle experiment at the KEKB collider. We select Ds →μvu decays with a method that provides a high-purity of the selected sample and an absolute mea...We present a preliminary measurement of the B（Ds→μvu） with the Belle experiment at the KEKB collider. We select Ds →μvu decays with a method that provides a high-purity of the selected sample and an absolute measurement of the branching fraction. The results are based on a data sample of 550 fb^-1 and are compared to similar measurements by other experiments as well as to the predictions of LQCD. We conclude with short prospects for improvements in the accuracy of the measurement.展开更多
文摘We present a preliminary measurement of the B（Ds→μvu） with the Belle experiment at the KEKB collider. We select Ds →μvu decays with a method that provides a high-purity of the selected sample and an absolute measurement of the branching fraction. The results are based on a data sample of 550 fb^-1 and are compared to similar measurements by other experiments as well as to the predictions of LQCD. We conclude with short prospects for improvements in the accuracy of the measurement.
