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arXiv 1404.3473nucl-thhep-exhep-phnucl-ex
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奇异度为-1和-2的最轻中性超核

The lightest neutral hypernuclei with strangeness -1 and -2

Jean-Marc Richard, Qian Wang, Qiang Zhao

摘要:

我们目前对重子-重子相互作用的了解表明,双中子$(n,n)$及其奇怪的类似物$(n,Λ)$是不稳定的。相比之下,情况对奇异三体系统$(n,n,Λ)$更有利,对四体系统$T\equiv (n,n,Λ,Λ)$更有利,奇异性$-2$在自发解离下很可能是稳定的。最近的超子-核子和超子-超子相互作用模型表明,在重子-重子相互作用的不确定性范围内,$(n,n,Λ)$和$T$的稳定性是可能的。这个新的核$T$可以在中心氘-氘碰撞中通过反应$d+d\to T+K^++K^+$产生和鉴定,并且这个四重子$T$可能在催化中子星中奇怪核的形成中起重要作用。

英文摘要:

Our current knowledge of the baryon--baryon interaction suggests that the dineutron $(n,n)$ and its strange analogue $(n,Λ)$ are unstable. In contrast, the situation is more favorable for the strange three-body system $(n,n,Λ)$, and even better for the four-body system $T\equiv (n,n,Λ,Λ)$ with strangeness $-2$, which is likely to be stable under spontaneous dissociation. The recent models of the hyperon-nucleon and hyperon-hyperon interactions suggest that the stability of the $(n,n,Λ)$ and $T$ is possible within the uncertainties of our knowledge of the baryon-baryon interactions. This new nucleus $T$ could be produced and identified in central deuteron--deuteron collisions via reaction $d+d\to T+K^++K^+$, and the tetrabaryon $T$ could play an important role in catalyzing the formation of a strange core in neutron stars.

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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