Some of semileptonic and nonleptonic decays of Bc meson in a Bethe-Salpeter relativistic quark model
Some of semileptonic and nonleptonic decays of Bc meson in a Bethe-Salpeter relativistic quark model
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DOI：
10.1007/s11433-015-5671-x
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发表时间：
2014-11
期刊：
影响因子：
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通讯作者：
Chao-Hsi Chang;Hui-Feng Fu;Guo-Li Wang;Jin-Mei Zhang
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文献类型：
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作者：
Chao-Hsi Chang;Hui-Feng Fu;Guo-Li Wang;Jin-Mei Zhang
在改进的瞬时Bethe-Salpeter（BS）方程和Mandelstern公式的框架下，研究了半轻子衰变和非轻子衰变Bc +→P（V）+L，其中P（V）表示赝标（矢量）粲偶素或介子，L表示轻介子.数值计算结果（衰变的宽度和分支比）以表格形式给出，为了便于比较，其他方法得到的结果也放在相应的表格中。基于这里估计的比率与LHC B $\frac{{\mathcal{B}\mathcal{R}（B_c^ +）的观测结果非常一致的事实， \to \psi（2S）\pi ^ +）}} {{\mathcal{B}\mathcal{R}（B_c^ + \to J/\psi \pi ^ +）}} = 0.250 \pm 0.068（stat）\pm 0.014（syst）\pm 0.006（\mathcal{B}）$，可以得出结论，对于衰变，本框架工作得相当好。
The semileptonic decaysand the nonleptonic decaysBc+→P(V) +L, whereP(V) denotes a pseudoscalar (vector) charmonium or-meson, andLdenotes a light meson, are studied in the framework of improved instantaneous Bethe-Salpeter (BS) equation and the Mandelstam formula. The numerical results (width and branching ratio of the decays) are presented in tables, and in order to compare conveniently, those obtained by other approaches are also put in the relevant tables. Based on the fact that the ratioestimated here is in good agreement with the observation by LHCb $\frac{{\mathcal{B}\mathcal{R}(B_c^ + \to \psi (2S)\pi ^ + )}} {{\mathcal{B}\mathcal{R}(B_c^ + \to J/\psi \pi ^ + )}} = 0.250 \pm 0.068(stat) \pm 0.014(syst) \pm 0.006(\mathcal{B}) $, one may conclude that with respect to the decays the present framework works quite well.