Forward-backward asymmetries in in the Bethe-Salpeter equation approach *

Abstract

Abstract Using the Bethe-Salpeter equation (BSE), we investigate the forward-backward asymmetries in in the quark-diquark model. This approach provides precise form factors that are different from those of quantum chromodynamics (QCD) sum rules. We calculate the rare decay form factors for b and investigate the (integrated) forward-backward asymmetries in these decay channels. We observe the integrated , , , and ; the hadron side asymmetries ; the lepton-hadron side asymmetries ; and the longitudinal polarization fractions .