Resolving B-CP puzzles in QCD factorization

被引：26
作者：
Cheng, Hai-Yang [1 ,2 ]
Chua, Chun-Khiang [3 ]
机构：
[1] Acad Sinica, Inst Phys, Taipei 115, Taiwan
[2] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA
[3] Chung Yuan Christian Univ, Dept Phys, Chungli 320, Taiwan
来源：
PHYSICAL REVIEW D | 2009年 / 80卷 / 07期
关键词：
SUM-RULE; PI-PI; DECAYS; ASYMMETRY; PHASES;
D O I：
10.1103/PhysRevD.80.074031
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Within the framework of QCD factorization (QCDF), power corrections due to penguin annihilation can account for the observed rates of penguin-dominated two-body decays of B mesons and direct CP asymmetries A(CP)(K-pi(+)), A(CP)(K*(-)pi(+)), A(CP)(K-rho(0)) and A(CP)(pi(+)pi(-)). However, the predicted direct CP-violating effects in QCDF for B- -> K-pi(0), K-eta, pi(-)eta and (B) over bar (0) -> pi(0)pi(0) are wrong in signs when confronted with experiment. We show that subleading 1/m(b) power corrections to the color-suppressed tree amplitude due to spectator scattering or final-state interactions will yield correct signs for aforementioned CP asymmetries and accommodate the observed pi(0)pi(0) and pi(0)pi(0) rates simultaneously. Implications are discussed.
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页数：8
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