AI 中文总结
针对双奇异重子Ξ(1620)和Ξ(1690)，本文在耦合道框架下研究介子-重子相互作用，发现符合K⁻Λ关联函数的振幅与相关质量分布实验数据不匹配。
AI 中文摘要
受近年来不同实验合作组发布的双奇异重子前两个激发态Ξ(1620)和Ξ(1690)的大量数据驱动，我们在耦合道框架下研究介子-重子相互作用，研究系统由赝标量介子和矢量介子组成，计算针对总自旋1/2、同位旋1/2的构型开展。树图阶相互作用源自基于手征对称性和隐定域对称性的拉格朗日量。我们尝试描述两部分数据：一是来自p p和Pb Pb碰撞的K⁻Λ费米子关联函数数据，二是不同系统（πΞ、K̄Σ和K̄Λ）的现有不变质量分布数据。研究发现，能使关联函数接近实验数据的振幅，会导致不同介子-重子系统的质量分布与实验数据不一致，反之亦然。
英文摘要
Motivated by a considerable release of data on first two excited states of the doubly strange baryon, $Ξ(1620)$ and $Ξ(1690)$, from different experimental collaborations in recent years, we investigate meson-baryon interactions in a coupled-channel approach. The systems are composed of pseudoscalar and vector mesons and the calculations are done for the total spin 1/2 and isospin 1/2 configuration. The tree-level interactions are deduced from Lagrangians based on chiral and hidden local symmetries. Specifically, we make an attempt to describe (1) data on the $K^-Λ$ femtoscopic correlation function coming from $p\,p$ and $Pb\,Pb$ collisions, and (2) the available data on invariant mass distributions for different systems: $πΞ$, $\bar K Σ$ and $\bar K Λ$. We find that the amplitude which yields the correlation function close to the data results in mass distributions of different meson-baryon systems that are in discordance with the experimental data and vice-versa.
