MEASUREMENT OF THE MOMENTS

摘要

The present status of the measurement of the moments of the leptonic and hadronic specrum in semileptonic b decays is reviewed. In particular Belle measures, independently, the electron energy moments for the semileptonic decays of the B~+ and the B~0. Particular emphasis is given on the factors affecting experimental and theoretical errors of the Cabibbo-Kobayashi-Masawa matrix element V_(cb).