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arXiv · 2411.08454

Revisiting $B\to K^*π$ and $B\to Kρ$ decays using the modified perturbative QCD approach

Ru-Xuan Wang·Mao-Zhi Yang
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Abstract

We revisit $B\to K^*π$ and $B\to Kρ$ 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 $μ_c$ is introduced to separate hard and soft contributions in the decay process. Hard contributions with scale $μ$ larger than $μ_c$ are calculated with perturbative QCD, and soft contributions with $μ<μ_c$ 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 $B\to K^*π$, $Kρ$ decays are calculated. With appropriate parameter inputs, the theoretical results can be in good agreement with experimental data.

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Ru-Xuan Wang, Mao-Zhi Yang. 2024-11-13. Revisiting $B\to K^*π$ and $B\to Kρ$ decays using the modified perturbative QCD approach. https://doi.org/10.1140/epjc%2Fs10052-025-13840-8

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