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arXiv 1507.03733hep-phnucl-th
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轻$Ξ$超核

Light $Ξ$ hypernuclei

H. Garcilazo, A. Valcarce

摘要:

在重子-重子奇异$-2$相互作用的不确定性范围内,提出了支持轻$ΞNN$超核与$(I)J^P=(3/2)1/2^+$的论点。如果绑定,则从最低$NΛΛ$系统解耦的该$ΞNN$状态将是稳定的。它也将受益于额外的约束力,由于电磁相互作用是什么使它值得寻找。我们展示了如何与$J=3/2$的等效状态可能永远不会绑定,尽管有吸引力的相互作用的两体子系统。我们说明我们的讨论与一个完整的Faddeev计算的$ΞNN$系统使用简单的潜力,模仿更复杂的相互作用。我们还与文献中最近不同的唯象相互作用进行了接触,如ESC 08奈梅亨势或基于夸克模型的势。

英文摘要:

Arguments in favor of a light $ΞNN$ hypernucleus with $(I)J^P=(3/2)1/2^+$ are presented, within the uncertainties of our knowledge of the baryon-baryon strangeness $-2$ interactions. If bound, this $ΞNN$ state, being decoupled from the lowest $NΛΛ$ system, would be stable. It will also benefit from additional binding due to the electromagnetic interaction what makes it worthwhile to look for. We show how the equivalent state with $J=3/2$ could never be bound in spite of the attractive interaction of the two-body subsystems. We illustrate our discussion with a full-fledged Faddeev calculation of the $ΞNN$ system using simple potentials that mimic more elaborate interactions. We also make contact with different recent phenomenological interactions from the literature, like the ESC08 Nijmegen potential or quark-model based potentials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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