标题： $CPT$对称性的测试在违反$CP$的$B$衰变中 显示英文标题

标题： Test of $CPT$ Symmetry in $CP$-violating $B$ Decays

摘要： 考虑到现有的$CPT$破坏实验限制仍然较差，我们探讨在$CP$破坏的$B$衰变中测试$CPT$对称性的各种可能方法，在$e^{+}e^{-}$ $B$ 工厂进行。 我们发现，在中性 $B$ 衰变到 $CP$ 本征态如 $\psi K_{S}$ 和 $\pi^{+}\pi^{-}$的时间积分测量中，很难区分直接 $CP$ 破坏和 $CPT$ 破坏的影响。 相反，对于几个非$CP$-eigenstate 通道，例如$B^{0}_{d}/\bar{B}^{0}_{d}\rightarrow D^{\pm}\pi^{\mp}$和$\stackrel{(-)}{D}$$^{(*)0}K_{S}$ ，可能会出现更清晰的小$CPT$破坏信号，在时间积分的$CP$不对称性中。 时间依赖性的$CP$不对称性测量，在原则上可用于限制中性$B$-介子衰变中$CPT$破坏效应的大小。 显示英文摘要

摘要： Considering that the existing experimental limit for $CPT$ violation is still poor, we explore various possible ways to test $CPT$ symmetry in $CP$-violating $B$ decays at $e^{+}e^{-}$ $B$ factories. We find that it is difficult to distinguish between the effect of direct $CP$ violation and that of $CPT$ violation in the time-integrated measurements of neutral $B$ decays to $CP$ eigenstates such as $\psi K_{S}$ and $\pi^{+}\pi^{-}$. Instead, a cleaner signal of small $CPT$ violation may appear in the time-integrated $CP$ asymmetries for a few non-$CP$-eigenstate channels, e.g., $B^{0}_{d}/\bar{B}^{0}_{d}\rightarrow D^{\pm}\pi^{\mp}$ and $\stackrel{(-)}{D}$$^{(*)0}K_{S}$. The time-dependent measurements of $CP$ asymmetries are available, in principle, to limit the size of $CPT$-violating effects in neutral $B$-meson decays.