Analysis of B → K*∗⁺ℓ⁻ decays at large recoil region

We study the exclusive decays of B → K* ∗⁺ℓ^- within the framework of the perturbative QCD (PQCD). We obtain the form factors for the B → K* transition in the large recoil region, where the PQCD for heavy B meson decays is reliable. We find that our results for the form factors at q² = 0 are consistent with those from most of the other QCD models in the literature. Via the decay chain of B → K* (Kπ)∗⁺∗⁻, we obtain many physical observables related to the different helicity combinations of B → K*∗⁺ℓ⁻. In particular, we point out that the T-violating effect suppressed in the standard model can be up to O(10%) in some CP violating models with new physics.