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Implications of new data in charmless B decays
Wu, Yue-Liang; Zhou, Yu-Feng; Zhuang, Ci; Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100080, Peoples R China
2006
发表期刊PHYSICAL REVIEW D
ISSN1550-7998
卷号74期号:9页码:-
摘要Based on the latest experimental data of B ->pi pi and pi K modes, a model-independent analytical analysis is presented. The CP-averaged branching ratio difference Delta R=R-c-R-n in B ->pi K decays with R-c=2Br(pi K-0(-))/Br(pi(-)(K) over bar (0)) and R-n=Br(pi K-+(-))/2Br(pi(0)(K) over bar (0)) is reduced though it remains larger than the prediction from the standard model (SM) as both measured R-n and R-c are enhanced, which indicates that a room for new physics becomes smaller. The present data of pi pi decay reduce the ratio vertical bar C/T vertical bar from the previous value of vertical bar C/T vertical bar similar or equal to 0.8 to vertical bar C/T vertical bar similar or equal to 0.65, which is still larger than the theoretical estimations based on QCD factorization and pQCD. Within SM and flavor SU(3) symmetry, the current pi K data also diminish the ratio vertical bar C/T-'vertical bar from the previous value vertical bar C'/T'vertical bar similar or equal to 2 to vertical bar C'/T'vertical bar similar or equal to 1.16 with a large strong phase delta(C)'similar or equal to-2.65, while its value remains much larger than the one extracted from the pi pi modes. The direct CP violation A(CP)(pi(0)(K) over bar (0)) is predicted to be A(CP)(pi(0)(K) over bar (0))=-0.15 +/- 0.03, which is consistent with the present data. Two kinds of new effects in both strong and weak phases of the electroweak penguin diagram are considered. It is found that both cases can reduce the ratio to vertical bar C'/T'vertical bar=0.40 similar to 0.80 and lead to roughly the same predictions for CP violation in pi K-0(0).
部门归属Chinese Acad Sci, Inst Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100080, Peoples R China; KEK, Theory Grp, Tsukuba, Ibaraki 3050801, Japan
关键词Qcd Factorization Pi Decays Physics Gamma
学科领域Physics
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收录类别SCI
WOS记录号WOS:000242409700030
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5879
专题理论物理所SCI论文
通讯作者Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100080, Peoples R China
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Wu, Yue-Liang,Zhou, Yu-Feng,Zhuang, Ci,et al. Implications of new data in charmless B decays[J]. PHYSICAL REVIEW D,2006,74(9):-.
APA Wu, Yue-Liang,Zhou, Yu-Feng,Zhuang, Ci,&Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100080, Peoples R China.(2006).Implications of new data in charmless B decays.PHYSICAL REVIEW D,74(9),-.
MLA Wu, Yue-Liang,et al."Implications of new data in charmless B decays".PHYSICAL REVIEW D 74.9(2006):-.
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