标题： $n \bar{D}_{s0}^*(2317)$相互作用的相关函数和弹性幺正性问题 显示英文标题

标题： Correlation function for the $n \bar{D}_{s0}^*(2317)$ interaction and the issue of elastic unitarity

摘要： 我们研究中子与$\bar D_{s0}^*(2317)$共振态的相互作用，并观察阈值以下和接近阈值以上的振幅。 该研究是从$D_{s0}^*(2317)$共振态是$DK$分子态的角度进行的。 为了研究这种相互作用，我们使用固定中心近似方法来求解法捷耶夫方程，其中将$DK$分子视为集团，中子作为外部粒子。 我们改进了固定中心方法，以在阈值附近实现弹性幺正性，这是获得散射参数和评估我们在此确定的$n \bar D_{s0}^*(2317)$关联函数所必需的。 研究的一个有趣结果是在阈值以下出现了一个共振态，结合能约为130 MeV，宽度约为80 MeV，我们建议在测量$\pi \Sigma \bar D$的不变质量的反应中进行观察。 ALICE合作组已开始此类研究，通过观察$p f_1(1285)$关联函数，我们只能鼓励这一方向的工作，这应该能提供大量关于许多共振态性质的有价值信息。 显示英文摘要

摘要： We study the interaction of a neutron with the $\bar D_{s0}^*(2317)$ resonance and look at the amplitude below threshold and close above threshold. The study is done from the perspective that the $D_{s0}^*(2317)$ resonance is a molecular state of $DK$. To study this interaction, we use the Fixed Center Approximation to Faddeev equations that considers the $DK$ molecule as the cluster and the neutron as the external particle. We improve the Fixed Center approach to implement elastic unitarity around threshold, which is needed to obtain scattering parameters and to evaluate the $n \bar D_{s0}^*(2317)$ correlation function that we determine here. One interesting result of the study is the appearance of a resonant state below threshold with a binding of about 130 MeV and a width of about 80 MeV, which we suggest to look at in reactions measuring the invariant mass of $\pi \Sigma \bar D$. The ALICE collaboration has initiated studies of this type, by looking at the $p f_1(1285)$ correlation function, and we can only encourage work in this direction which should provide much valuable information on the nature of many resonant states.