Branching ratios, forward-backward asymmetries, and angular distributions of B → K*2l+l- in the standard model and two new physics scenarios

We analyze the B -> K*(2)(-> K pi)l(+)l(-) ( with l = e, mu, tau) decay in the standard model and two new physics scenarios: the vectorlike quark model and family nonuniversal Z' models. We derive the differential angular distributions using the recently calculated form factors in the perturbative QCD approach. Branching ratios, polarizations, forward-backward asymmetries, and transversity amplitudes are predicted, from which we find a promising prospective to observe this channel in future experiments. We update the constraints on effective Wilson coefficients and/or free parameters in these two new physics scenarios by making use of the B -> K*l(+)l(-) and b -> sl(+)l(-) experimental data. Their impact on B -> K*(2)l(+)l(-) is subsequently explored and, in particular, the zero-crossing point for the forward-backward asymmetry in these new physics scenarios can sizably deviate from the standard model. In addition we also generalize the analysis to a similar mode, B-s -> f'(2)(1525)(-> K+K-)l(+)l(-).