Measurement of the decay B-0 -> pi(-) l(+) nu and determination of vertical bar V-ub vertical bar .

Abstract

We present a measurement of the charmless semileptonic decay B0 using a data sample containing 657 106 B B events collected with the Belle detector at the KEKB asymmetric-energy eþe collider operating near the resonance. We determine the total branching fraction of the decay, BB0 We also report a new precise measurement of the differential decay rate and extract the Cabibbo-Kobayashi-Maskawa matrix element jVub j using model-independent and model-dependent approaches. From a simultaneous fit to the measured differential