The weak decay Bc to Z(3930) and X(4160) by Bethe-Salpeter method
The weak decay Bc to Z(3930) and X(4160) by Bethe-Salpeter method
复制标题
通过 Bethe-Salpeter 方法将 Bc 弱衰变为 Z(3930) 和 X(4160)
DOI：
10.1140/epjc/s10052-020-8372-1
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发表时间：
2020
影响因子：
4.4
通讯作者：
Guo-Li Wang
中科院分区：
文献类型：
--
作者：
Zhi-Hui Wang;Yi Zhang;Tianhong Wang;Yue Jiang;Guo-Li Wang
将Z(3930)和X(4160)分别作为χc2(2P)和χc2(3P)态，用改进的BetheSalpeter(B-S)方法研究了Bc衰变到Z(3930)和X(4160)的半轻子和非轻子态.衰变的形状因子是通过介子波函数在整个可达运动范围内的重叠积分来计算的。在排他衰变中考虑了相对论修正的影响。预测了Bc弱衰变对Z(3930)和X(4160)的分枝比。分枝比分别为：Br3(Bc+→Z(3930)e+νe)=(3.03-0.16+0.09)×10-4和Br2(Bc+→X(4160)e+νe)=(3.55-0.35+0.83)×10-6。这些结果可能为发现Z(3930)和X(4160)提供有用的信息，并为Bc物理的唯象研究提供必要的信息。
Considering Z (3930) and X (4160) as χ c 2 (2 P) and χ c 2 (3 P) states, the semileptonic and nonleptonic of B c decays to Z (3930) and X (4160) are studied by the improved Bethe–Salpeter (B–S) Method. The form factors of decay are calculated through the overlap integrals of the meson wave functions in the whole accessible kinematical range. The influence of relativistic corrections are considered in the exclusive decays. Branching ratios of B c weak decays to Z (3930) and X (4160) are predicted. Some of the branching ratios are: B r (B c+→ Z (3930) e+ ν e)=(3. 03-0.16+ 0.09)× 10-4 and B r (B c+→ X (4160) e+ ν e)=(3. 55-0.35+ 0.83)× 10-6. These results may provide useful information to discover Z (3930) and X (4160) and the necessary information for the phenomenological study of B c physics.