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arXiv 1004.4274hep-phhep-ex
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光锥夸克模型中B_c介子的稀有衰变

B_c meson rare decays in the light-cone quark model

Teng Wang, Tianbo Liu, Da-Xin Zhang, Bo-Qiang Ma

摘要:

在光锥夸克模型(LCQM)框架下研究了稀有衰变$B_c \rightarrow D_s(1968) \ell \bar{\ell}$和$B_c\rightarrow D_s^*(2317) \ell \bar{\ell}$。过渡形状因子的计算在类空区域,然后解析地继续通过指数参数化的类时区域。给出了这两种衰变的分支比和轻子纵向极化不对称性,并进行了比较。这些结果有助于研究$B_c$介子的结构和检验CKM夸克混合矩阵的么正性。所有这些结果都可以在LHC未来的实验中进行测试。

英文摘要:

We investigate the rare decays $B_c \rightarrow D_s(1968) \ell \bar{\ell}$ and $B_c\rightarrow D_s^*(2317) \ell \bar{\ell}$ in the framework of the light-cone quark model (LCQM). The transition form factors are calculated in the space-like region and then analytically continued to the time-like region via exponential parametrization. The branching ratios and longitudinal lepton polarization asymmetries (LPAs) for the two decays are given and compared with each other. The results are helpful to investigating the structure of $B_c$ meson and to testing the unitarity of CKM quark mixing matrix. All these results can be tested in the future experiments at the LHC.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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