B^+→D_±π^+衰变过程中的直接CP破缺

Direct CP Violation in B^+→D_±π^+

利用朴素因子化方法,对衰变过程B^+→D±π^+的CP(Charge-Parity)破缺现象进行了研究。研究表明,这两个过程的CP破缺有很强的关联。首先利用B^+→D+π^+过程CP破缺的实验值抽取出强相位角δ1=195.95°±5.15°,δ2=344.35°±5.15°,然后利用抽取的强相位角预言B^+→D-π^+过程的CP破缺为0.0082±0.0026和0.0079±0.0026。

Using the na ve factorization approach,the phenomenon of CP(Charge-Parity)violations in the decay process B^+→D±π^+was studied.It shows that there is a strong correlation between the CP violation in these two processes.First,the strong phase is extracted by using the experimental values of CP violation of B^+→D+π^+process,which isδ1=195.95°±5.15°andδ2=344.35°±5.15°.Then use the extracted strong phase to predict the CP violation of the B^+→D-π^+process,which violation is 0.0082±0.0026 and 0.0079±0.0026.