Determination of |Vcb| from the polarization of vector meson in the semileptonic decay of B and Bc meson

Since the degree of polarization of the vector particle in semileptonic decay strongly influences the decay width of the particles, it can be used as a measure of Cabibbo-Kobayashi-Maskawa quark-mixing matrix elements. We show that |Vcb| can be determined from the measurement of polarization of vector meson in B̄,B̄c→Vlν̄ decay, where V is vector meson.