Nonfactorizable B→χc0K decay and QCD factorization

被引：0
|
作者：
Meng Ce [1 ]
Gao Ying-Jia
Chao Kuang-Ta
机构：
[1] Beijing Univ, Dept Phys, Beijing 100871, Peoples R China
[2] China Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R China
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2007年 / 48卷 / 05期
关键词：
B meson decay; QCD factorization; charmonium;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the unexpectedly large rate for the factorization-forbidden decay B -> chi K-c0 within the QCD factorization approach. We use a non-zero gluon mass to regularize the infrared divergences in vertex corrections. The end-point singularities arising from spectator corrections are regularized and carefully estimated by the off-shellness of quarks. We find that the contributions arising from the vertex and leading-twist spectator corrections are numerically small, and the twist-3 spectator contribution with chiral enhancement and linear end-point singularity becomes dominant. With reasonable choices for the parameters, the branching ratio for B -> chi K-c0 decay is estimated to be in the range (2 similar to 4) x 10(-4), which is compatible with the Belle and BaBar data.
引用
收藏
页码：885 / 890
页数：6
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