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[en] We report on our studies of B→KJl+l- in the standard model and several new physics variations, with KJ denoting a kaonic resonance. In terms of helicity amplitudes, we derive a compact form for the full angular distributions, and use them to calculate the branching ratios, forward-backward asymmetries and polarizations. We have updated the constraints on effective Wilson coefficients and/or free parameters in these new physics scenarios by making use of the B→K*l+l- and b→sl+l- experimental data. Their impact on B→K*Jl+l- is subsequently explored and in particular the zero-crossing point for forward-backward asymmetry in new physics scenarios can sizably deviate from the standard model.