Revisiting B- K ∗ π and B- Kρ decays using the modified perturbative QCD approach

被引：0
|
作者：
Wang, Ru-Xuan [1 ]
Yang, Mao-Zhi [1 ]
机构：
[1] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL C | 2025年 / 85卷 / 02期
基金：
中国国家自然科学基金;
关键词：
DISTRIBUTION AMPLITUDES; WAVE-FUNCTIONS; MESON; FACTORIZATION; EXTRACTION;
D O I：
10.1140/epjc/s10052-025-13840-8
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We revisit B- K*pi and B- K rho 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 mu cis introduced to separate hard and soft contributions in the decay process. Hard contributions with scale mu larger than mu care calculated with perturbative QCD, and soft contributions with mu < mu(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- K*pi, K rho decays are calculated. With appropriate parameter inputs, the theoretical results can be in good agreement with experimental data.
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页数：15
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