Interplay between weak and strong phases and direct CP violation from the charmless B-meson decays
Interplay between weak and strong phases and direct CP violation from the charmless B-meson decays
复制标题
弱相和强相之间的相互作用以及无魅力的 B 介子衰变的直接 CP 破坏
DOI：
10.1103/physrevd.63.054011
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发表时间：
2000
影响因子：
5
通讯作者：
Chao
中科院分区：
文献类型：
--
作者：
Yihan Zhou;Yu;John N. Ng;Chao
本文对无粲B介子衰变B --> pi，pi和piK进行了一般分析。值得注意的是，最终状态的相互作用和非弹性重散射效应必须是显着的，以了解当前数据的一致性。利用一般的同位旋分解方法，可以从实验数据的整体χ（2）拟合中提取出同位旋振幅和相应的强相位。我们强调，一般来说有两个。而不是一个相对较强的分解阶段。在文献中考虑的两个相等强相的假设下，目前的数据，特别是关于Bi --> pi K-o（o（+/-））衰变的数据，将意味着一个大的同位旋振幅\a（3/2）（c）\>40，它比朴素因子分解估计的振幅大5倍。当考虑两个不同的强相位时，所有的同位旋振幅在la能级内都可以与理论值相比较。我们还证明了两个强相之间的差别不可能太大，并且将受到最近的B --> pi（o）pi（o）衰变上界的限制.在任何情况下，强相被发现是大的和分支比B --> pi（o）pi（o）可能会提高一个数量级相比，从朴素的因式分解方法获得的。在所有衰变模式的直接CP违规也被计算，发现是接近本实验的灵敏度。
We present a general analysis on charmless B-meson decays B --> pi pi and piK. It is noticed that the final state interactions and inelastic rescattering effects must be significant in order to understand the consistency of the current data. By using general isospin decompositions, the isospin amplitudes and the corresponding strong phases could be extracted from a global chi (2) fit Of the experimental data. We emphasize that in general there are two. rather than one, relative strong phases in the decomposition. In the assumption of two equal strong phases as considered in the literature, the current data, especially the ones concerning Bi --> pi K-o(o(+/-)) decays, will imply a large isospin amplitude \a(3/2)(c)\>40, which is larger by a factor of 5 than the one from the naive factorization estimation. When two different strong phases are considered, all the isospin amplitudes can become, within the la level, comparable with the theoretical values. We also show that the difference between the two strong phases cannot be too large and will be restricted by the most recent upper bound of B --> pi (o)pi (o) decay. In any case, the strong phases are found to be large and the branching ratio of B --> pi (o)pi (o) is likely to be enhanced by an order of magnitude in comparison with the one obtained from the naive factorization approach. Direct CP violations in all decay modes are also calculated and found to be close to the sensitivity of the present experiments.