Branching ratios and CP asymmetries of Bu/d/s → K0* (1430) (K)over-bar0* (1430) decays in the pQCD approach

被引：13
|
作者：
Liu, Xin [1 ,2 ,3 ]
Xiao, Zhen-Jun [2 ,3 ]
Zou, Zhi-Tian [4 ]
机构：
[1] Jiangsu Normal Univ, Sch Phys & Elect Engn, Xuzhou 221116, Jiangsu, Peoples R China
[2] Nanjing Normal Univ, Dept Phys, Nanjing 210046, Jiangsu, Peoples R China
[3] Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210046, Jiangsu, Peoples R China
[4] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
来源：
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2013年 / 40卷 / 02期
基金：
中国国家自然科学基金;
关键词：
QCD FACTORIZATION; DISTRIBUTION AMPLITUDES; FORM-FACTORS; EXTRACTION; BREAKING; MASSES;
D O I：
10.1088/0954-3899/40/2/025002
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：
Based on the assumption of a two-quark structure of the scalar K-0* (1430), the CP-averaged branching ratios (BRs) and CP-violating asymmetries of nonleptonic B-u/d/s -> K-0* (1430) (K) over bar (0)* (1430) decays are studied in two scenarios, namely scenario 1 and scenario 2, for the light-cone distribution amplitudes of the K-0* (1430) meson in the standard model, by employing the perturbative QCD (pQCD) approach. Our predictions are the following: (1) the CP-averaged BRs for B-u/d/s -> K-0* (1430) (K) over bar (0)* (1430) decays in both scenarios vary in the range of 10(-6) similar to 10(-4) in the standard model; (2) the magnitudes of A(CP)(dir) (B-u -> K-0* (1430) + (K) over bar (0)* (1430)(0)) and A(CP)(dir) (B-d/s -> K-0* (1430) + K-0* (1430)(-)) in scenario 1 are much larger than the corresponding magnitudes in scenario 2; (3) there are no direct CP violations in B-d/s -> K-0* (1430)(0)(K) over bar (0)* (1430)(0) decays in the standard model because of the involved pure penguin topology. An experimental confirmation of our pQCD predictions at the predicted level will favor the q (q) over bar structure of the scalar K-0* (1430) and help us to understand its physical properties and the QCD dynamics involved.
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收藏
页数：18
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