科研之友
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摘要
In this paper, we compute the forward-backward asymmetry and the isospin asymmetry of the B -> K*mu(+)mu(-) decay. The B -> K* transition form factors (TFFs) are key components of the decay. To achieve a more accurate QCD prediction, we adopt a chiral correlator for calculating the QCD light cone sum rules for those TFFs with the purpose of suppressing the uncertain high-twist distribution amplitudes. Our predictions show that the asymmetries under the standard model and the minimal supersymmetric standard model with minimal flavor violation are close in shape for q(2) >= 6 GeV2 and are consistent with the Belle, LHCb, and CDF data within errors. When q(2) < 2 GeV2, their predictions behave quite differently. Thus, a careful study on the B -> K*mu(+)mu(-) decay within the small q(2) region could be helpful for searching new physics beyond the standard model. As a further application, we also apply the B -> K* TFFs to the branching ratio and longitudinal polarization fraction of the B -> K*nu<(nu)over bar> decay within different models.
