论文标题
夸克模型中$λ_c$的hadronic弱衰减
Hadronic weak decays of $Λ_c$ in the quark model
论文作者
论文摘要
在组成夸克模型的框架内研究了$λ_c$的hadronic弱衰变。通过对Cabbibo最佳过程的组合分析，$λ_c\toλπ^+$，$σ^0π^+$和$σ^+π^0 $，我们确认不可分割的过渡机制在理解其兼容分支比率方面起着至关重要的作用。我们强调的是，SU（3）风味对称性破坏效应通常以$ 1 \ sim 2 \％$的顺序为单位，可以通过图表中具有内部转换的图表中的极点术语中的破坏性干扰来放大。一些贡献对$λ_C$中标量等磁夸克部门的空间分布很敏感，并且它与最终状态超子处于光夸克的重叠。也就是说，紧凑的diquark配置是不利的。
The hadronic weak decays of $Λ_c$ are studied in the framework of a constituent quark model. With the combined analysis of the Cabbibo-favored processes, $Λ_c\to Λπ^+$, $Σ^0π^+$ and $Σ^+π^0$, we confirm that the non-factorizable transition mechanisms play a crucial role in the understanding of their compatible branching ratios. We emphasize that the SU(3) flavor symmetry breaking effects, which is generally at the order of $1\sim 2\%$, can be amplified by the destructive interferences among the pole terms in the diagrams with internal conversion. Some contributions are sensitive to the spatial distribution of the scalar-isoscalar light-quark sector in the $Λ_c$, and its overlap with the light quarks in the final state hyperon. Namely, a compact diquark configuration is disfavored.
