Abstract
We revisit B→K∗π and B→Kρ decay processes using the modified perturbative QCD approach, which is developed based on the perturbative QCD approach with a few improvements. A critical infrared cutoff scale μc is introduced to separate hard and soft contributions in the decay process. Hard contributions with scale μ larger than μc are calculated with perturbative QCD, and soft contributions with μ<μc are described in terms of soft transition and production form factors. In addition, color-octet contributions are considered phenomenologically. The branching fractions and CP violations of B→K∗π, Kρ decays are calculated. With appropriate parameter inputs, the theoretical results can be in good agreement with experimental data.
Published Version
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