Estimates for Forward-Backward Asymmetry in B->K*(892)l+l-

Forward-backward charge asymmetry in rare dilepton B-decays is formulated with the assumption of an on-shell b-quark. We find that the asymmetry is expressed in terms of two spatially transverse helicity amplitudes, which are determined by combining the data of D → K (892) l+ν with heavy flavour symmetry. We estimate the charge asymmetry of B → K* (892) l+l- for large energy leptons against various top masses in the standard model.