不存在$Λnn$束缚态
Nonexistence of a $Λnn$ bound state
摘要：
最近有人提出存在两个中子的中性束缚态和一个$Λ$超子$^3_Λn$。我们指出，无论是使用简单的可分势或一个完整的计算与现实重子重子相互作用来自组分夸克集团模型有这样的$Λnn$束缚态的存在是不可能的。为此，我们在$(I,J^P)=(1,1/2^+)$通道中，利用能很好地描述两体$NN$和$NY$数据以及$Λnp$超曲子的组分夸克团模型导出的相互作用，对$Λnn$系统进行了完整的Faddeev计算。
英文摘要：
It has been recently suggested the existence of a neutral bound state of two neutrons and a $Λ$ hyperon, $^3_Λn$. We point out that using either simple separable potentials or a full-fledged calculation with realistic baryon-baryon interactions derived from the constituent quark cluster model there is no possibility for the existence of such a $Λnn$ bound state. For this purpose, we performed a full Faddeev calculation of the $Λnn$ system in the $(I,J^P)=(1,1/2^+)$ channel using the interactions derived from the constituent quark cluster model which describe well the two-body $NN$ and $NY$ data and the $Λnp$ hypertriton.
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