A novel observable measuring the CP asymmetry in multi-body decays of heavy mesons, which is called the forward-backward asymmetry induced CP asymmetry (FBI-CPA), $A_{CP}^{FB}$, is introduced. This observable has the dual advantages that 1) it can isolate the CP asymmetry associated with the interference of the S- and P-wave amplitude from that associated with the S- or P-wave amplitude alone; 2) it can effectively almost double the statistics comparing to the conventionally defined regional CP asymmetry. We also suggest to perform the measurements of FBI-CPA in some three-body decay channels of charm and beauty mesons.

中文翻译：

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多体衰变中CP破坏的新观测及其在魅力和美介子衰变中的应用潜力

一种新颖的可观察到的测量的CP在重介子，这就是所谓的前后不对称诱导的多体衰变不对称CP不对称（FBI- CP A），${\mathrm{一种}}_{C磷}^{F乙}$，介绍。这种观测具有双重优点：1）它可以将与S波和P波幅度干扰相关的CP不对称性与单独与S波或P波幅度相关的CP不对称性隔离开；2) 与传统定义的区域CP不对称相比，它可以有效地将统计数据几乎翻倍。我们还建议执行FBI-的测量CP的魅力和美丽介子的一些三体衰变通道A。