Dynamically exact four-body calculation of the \({\bar{K}}NNN\) system is described. Position and width of the quasi-bound state in the four-body system are being evaluated. A quasi-bound state in the \(K^- np\) subsystem, which was absent in our previous studies, was found. The state differs from the known atomic state in kaonic deuterium, it is caused by strong interactions only.

中文翻译：

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$${\bar{K}}NNN$$ K ¯ NNN 系统的四体 Faddeev 型计算：$$K^- np$$ K - np 准束缚态

描述了\({\bar{K}}NNN\)系统的动态精确四体计算。正在评估四体系统中准束缚态的位置和宽度。发现了\(K^- np\)子系统中的准束缚态，这在我们之前的研究中是不存在的。该状态与 kaonic 氘中已知的原子状态不同，它仅由强相互作用引起。