标题： b重子的半τ子衰变在标准模型中 显示英文标题

标题： b-baryon semi-tauonic decays in the Standard Model

摘要： 在HQET的框架下，研究了$\Lambda_{b}\rightarrow\Lambda_{c}\tau\bar{\nu}_{\tau}$和$\Omega_{b}\rightarrow\Omega_{c}^{(*)}\tau\bar{\nu}_{\tau}$的弱衰变到$1/m_c$和$1/m_b$阶。写出了手性振幅。应用了由QCD求和规则和大$N_c$方法给出的相关Isgur-Wise函数进行数值分析。得到了重子R比值$R(\Lambda_c)$和$R(\Omega_c^{(*)})$。 显示英文摘要

摘要： Within the framework of HQET, $\Lambda_{b}\rightarrow\Lambda_{c}\tau\bar{\nu}_{\tau}$ and $\Omega_{b}\rightarrow\Omega_{c}^{(*)}\tau\bar{\nu}_{\tau}$ weak decays are studied to the order of $1/m_c$ and $1/m_b$. Helicity amplitudes are written down. Relevant Isgur-Wise functions given by QCD sum rule and large $N_c$ methods are applied in the numerical analysis. The baryonic R-ratios $R(\Lambda_c)$ and $R(\Omega_c^{(*)})$ are obtained.