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16–20 Oct 2026
成都理工大学
Asia/Shanghai timezone

Search for the low-lying excited baryon Σ(1/2^-) through process Λ_c^+ to Λ K^0 π+

Not scheduled
20m
成都理工大学

成都理工大学

成都市成华区二仙桥东三路1号

Speaker

胜超 张

Description

该工作在手征幺正方法框架下,通过 S 波赝标介子-八重态重子相互作用动态产生低激发重子 $\Sigma^*(1/2^-)$,同时考虑中间共振态 $K^*(892)$ 与 $N(1535)$的贡献,研究了单Cabibbo压低过程 $\Lambda_c^+ \to \Lambda K^0 \pi^+$;计算结果与BESIII测量的$\pi^+ K^0$ 不变质量分布的实验数据符合很好($\chi^2/\mathrm{d.o.f.} = 0.98$),并在$\pi^+ \Lambda$ 不变质量谱约 $1.43~\mathrm{GeV}$ 处预言了与$\Sigma^*(1/2^-)$ 相联系的 cusp 结构。

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