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题名: Implications of new data in charmless B decays
作者: Wu, Yue-Liang ;  Zhou, Yu-Feng ;  Zhuang, Ci
刊名: PHYSICAL REVIEW D
出版日期: 2006
卷号: 74, 期号:9, 页码:-
关键词: QCD FACTORIZATION ;  PI DECAYS ;  PHYSICS ;  GAMMA
学科分类: Physics
通讯作者: Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Kavli Inst Theoret Phys China, Beijing 100080, Peoples R China
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
英文摘要: 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).
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000242409700030
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5879
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Wu, Yue-Liang,Zhou, Yu-Feng,Zhuang, Ci. Implications of new data in charmless B decays[J]. PHYSICAL REVIEW D,2006,74(9):-.
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