论文标题
CP违反非律师$ b_c $损失激动的最终状态
CP violation in non-leptonic $B_c$ decays to excited final states
论文作者
论文摘要
我们研究了CP违规的两体非质子衰减的$ B_C $ MESON。我们专注于在最终状态中至少包含一个激发重膜的衰减通道。具体而言，考虑以下渠道：$ b_c \ to c \ bar c（2s，2p）+\ bar cq（1s，1p）$，$ b_c \ to c \ bar c（1s）+\ bar cq（2s，2p）$，$ b_c \ to c \ bar c \ b_ c \ b c \ b c \ b c cq（1p）+b b c cq（cq cq cq cq cq cq cq cq cq cq cq cq cq cq cq c c c c c c c c c cq（2s） c（1d）+\ bar cq（1s，1p）$和$ b_c \ to c \ bar c（3s）+\ bar cq（1s）$。改进的Bethe-Salpeter方法用于计算Hadronic Transition矩阵元素。我们的结果表明，某些衰减模式具有较大的分支比率，其顺序为$ 10^{ - 3} $。 $ b_c \ rightArrowη_c（1s）+d（2s）$，$ b_c \rightArrowη_c（1s）+d_0^{*}（2p）$和$ b_c \ rightArrow j/artarrow j/ψ+d^{*}（2s）$最大可能找到。如果此类渠道中CP不对称的检测精度可以达到$3σ$级别，则需要至少$ 10^7 $ $ $ b_c $事件。
We study the CP violation in two-body nonleptonic decays of $B_c$ meson. We concentrate on the decay channels which contain at least one excited heavy meson in the final states. Specifically, the following channels are considered: $B_c\to c\bar c(2S, 2P)+\bar cq(1S, 1P)$, $B_c\to c\bar c(1S)+\bar cq(2S, 2P)$, $B_c\to c\bar c(1P)+\bar cq(2S)$, $B_c\to c\bar c(1D)+\bar cq(1S, 1P)$, and $B_c\to c\bar c(3S)+\bar cq(1S)$. The improved Bethe-Salpeter method is applied to calculate the hadronic transition matrix element. Our results show that some decay modes have large branching ratios, which is of the order of $10^{-3}$. The CP violation effect in $B_c \rightarrow η_c(1S)+D(2S)$, $B_c \rightarrow η_c(1S)+D_0^{*}(2P)$, and $B_c \rightarrow J/ψ+D^{*}(2S)$ are most likely to be found. If the detection precision of the CP asymmetry in such channels can reach the $3σ$ level, at least $10^7$ $B_c$ events are needed.
