标题： 对纯企鹅诱导的$B^{\pm}_{u}$衰变中$CP$异常的进一步研究 显示英文标题

标题： A Further Study of $CP$ Asymmetries in Pure Penguin-induced $B^{\pm}_{u}$ Decays

摘要： 我们进一步研究了利用两环重整化群改进的有效哈密顿量和因子化近似方法，在纯胶子引起的衰变模式$B^{-}_{u}\rightarrow K^{(*)0} + K^{(*)-}$和$B^{-}_{u} \rightarrow \bar{K}^{(*)0} + (\pi^{-}, \rho^{-}, a^{-}_{1})$中的$CP$不对称性。 与之前未考虑QCD修正的结果不同，每组中的$CP$不对称性得到了增强，并根据各自的因子化系数进行了分类。 提出对每组的纯胶子模式进行求和，以获得一个有效的分支比和一个{\it 加权平均数}的$CP$破坏信号，这在实验观测中应具有统计显著性。 显示英文摘要

摘要： We make a further study of $CP$ asymmetries in the pure penguin-induced decay modes $B^{-}_{u}\rightarrow K^{(*)0} + K^{(*)-}$ and $B^{-}_{u} \rightarrow \bar{K}^{(*)0} + (\pi^{-}, \rho^{-}, a^{-}_{1})$ by using the two-loop renormalization-group-improved effective Hamiltonian and factorization approximation. Different from the previous results obtained without QCD corrections, the $CP$ asymmetries in each of the two groups are enhanced and classified with their respective factorization coefficients. A sum over the pure penguin modes of each group is proposed to obtain an effective branching ratio and a {\it weighted-mean} signal of $CP$ violation, which should be statistically significant for experimental observation.