CP VIOLATION IN B-MESON DECAYS
CP VIOLATION IN B-MESON DECAYS
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DOI：
10.1103/physrevd.23.1567
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发表时间：
1981-01-01
影响因子：
5
通讯作者：
SANDA, AI
中科院分区：
文献类型：
--
作者：
CARTER, AB;SANDA, AI
讨论了底区CP破坏的模式。我们介绍了揭示B介子级联衰变中新的CP破坏效应的一般技术。在Kobayashi-Maskawa（KM）模型中，对于模型参数的合理值，这样获得的CP不对称性范围为2-20%。这将与先前在该模型中展示的10− 3-10− 4阶的小效应进行比较。这种规模的影响应该在即将进行的实验中观察到。我们的方法强调的是构成重介子到普通强子级联衰变的在壳层跃迁，而不是发生在K − K混合类似物中的离壳层跃迁。由我们的技术产生的CP不对称性是sin δ阶，其中δ是KM相位角，因此表示在该模型中可获得的最大效果。
The pattern of CP violation in the bottom sector is discussed. We introduce general techniques to expose new CP-violating effects in the cascade decays of B mesons. In the Kobayashi-Maskawa (KM) model, the CP asymmetries so obtained range from 2-20% for plausible values of the model parameters. This is to be compared with the small effects, of order 10− 3-10− 4, previously exhibited within this model. Effects of this size should be observable in upcoming experiments. Our approach stresses the on-shell transitions which make up the cascade decays of heavy mesons to ordinary hadrons, as opposed to the off-shell transitions which occur in the analogs of K∘− K∘ mixing. The CP asymmetries generated by our techniques are of order sin δ, where δ is the KM phase angle, and thus represent the maximum effects obtainable in this model.