$Λ^*$ matter and its stability

We performed calculations of nuclear systems composed solely of $Λ^*$ hyperons, aiming at exploring the possibility of existence of absolutely stable $Λ^*$ matter. We considered $Λ^*$ interaction strengths compatible with the $Λ^*Λ^*$ binding energy $B_{Λ^*Λ^*}$ given by the $\bar{K}N$ interaction model by Yamazaki and Akaishi [1]. We found that the binding energy per $Λ^*$ saturates at values well below 100 MeV for mass number $A\geq120$. The $Λ^*$ matter is thus highly unstable against strong interaction decay.

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