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题名: Isospin relation and SU(3) breaking effects of strong phases in charmless B decays
作者: Wu, Yue-Liang ;  Zhou, Yu-Feng
刊名: EUROPEAN PHYSICAL JOURNAL C
出版日期: 2004
卷号: 32, 期号:0, 页码:S179-S189
学科分类: Physics
通讯作者: Wu, YL , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
部门归属: [Wu, Yue-Liang] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; [Zhou, Yu-Feng] Univ Munich, Sekt Phys, D-80333 Munich, Germany
英文摘要: Isospin and flavor SU(3) relations in charmless hadronic B decays B -> pi pi, pi K are investigated in detail with paying attention to the SU(3) symmetry breaking effects in both amplitudes and strong phases. In general, the isospin and the flavor SU(3) structure of the effective Hamiltonian provide several relations among the amplitudes and strong phases. Whereas a global fit to the latest data shows that some relation seems not to be favorable for a consistent explanation to the current data within the standard model (SM). By considering several patterns of SU(3) breaking, the amplitudes and the corresponding strong phases are extracted and compared with the theoretical estimations. It is found that in the case of SU(3) limits and also the case with SU(3) breaking only in amplitudes, the fitting results lead to an unexpected large ratio between two isospin amplitudes a(3)(c)/2/a(3)(u)/2, which is about an order of magnitude larger than the SM prediction. The results are found to be insensitive to the weak phase gamma. By including SU(3) breaking effects on the strong phases, one is able to obtain a consistent fit to the current data within the SM, which implies that the SU(3) breaking effect on strong phases may play an important role in understanding the observed charmless hadronic B decay modes B -> pi pi and pi K. It is possible to test those breaking effects in the near future from more precise measurements of direct CP violation in B factories.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000207562800008
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内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14055
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. Isospin relation and SU(3) breaking effects of strong phases in charmless B decays[J]. EUROPEAN PHYSICAL JOURNAL C,2004,32(0):S179-S189.
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