The B → Ds(*)π decays in perturbative QCD

被引：2
作者：
Zhang, Zhi-Qing [1 ]
机构：
[1] Henan Univ Technol, Dept Phys, Zhengzhou 450052, Henan, Peoples R China
来源：
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2009年 / 36卷 / 12期
关键词：
FORM-FACTORS; WEAK DECAYS;
D O I：
10.1088/0954-3899/36/12/125004
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
In this paper, we calculate the branching ratios for B-0 -> D-s(+)pi(-), B+ -> D-s(+)pi(0), B-0 -> D-s*(+) pi(-) and B+ -> D-s*(+) pi(0) decays in the perturbative QCD factorization approach. We find that the calculated branching ratios of these four decay channels agree well with the measured values and the current experimental upper limit. In the numerical calculation, we take the decay constant and the shape parameter of the vector meson D-s* as f(Ds*) = 312 MeV and a(Ds*) = 0.78 respectively, which are larger than those in the previous calculations.
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