论文标题
中性的重型型系统具有陌生性
Neutral baryonic systems with strangeness
论文作者
论文摘要
我们审查了存在由中子和$λ$ hyperons制成的三体和四体约束状态的状态。对于有趣的情况，已经解决了与由不同陌生的带电颗粒制成的中性重型系统的耦合。有强有力的论点表明，$λnn$系统没有约束状态。 $λλnn$ strong稳定状态并不是我们当前对陌生人$ -1 $和$ -2 $ baryon-baryon互动的了解。但是，可能存在$ξ^ - t $ quasibound状态腐烂至$λλNn$。同样，关于$λλn$绑定状态的不存在的广泛共识。但是，与$ξnn$状态的耦合为高于$λλN$阈值的共振打开了大门。
We review the status as regards the existence of three- and four-body bound states made of neutrons and $Λ$ hyperons. For interesting cases, the coupling to neutral baryonic systems made of charged particles of different strangeness has been addressed. There are strong arguments showing that the $Λnn$ system has no bound states. $ΛΛnn$ strong stable states are not favored by our current knowledge of the strangeness $-1$ and $-2$ baryon-baryon interactions. However, a possible $Ξ^- t$ quasibound state decaying to $ΛΛnn$ might exist in nature. Similarly, there is a broad agreement about the nonexistence of $ΛΛn$ bound states. However, the coupling to $ΞNN$ states opens the door to a resonance above the $ΛΛn$ threshold.
