双$Λ$超核$^{11}_{ΛΛ}$ Be的五体簇结构
Five-body cluster structure of double-$Λ$ hypernucleus $^{11}_{ΛΛ}$Be
摘要：
在$ααn ΛΛ$五体模型的框架内计算了双$Λ$超核$^{11}_{ΛΛ}$ Be的能级。组成粒子之间的相互作用的确定，以便合理地再现所观察到的低能量的$αα$，$ααn$核和现有的数据$Λ$ -结合能的$αΛ$，$ααΛ$，$αn Λ$和$ααn Λ$系统的属性。构造了一个有效的$ΛΛ$相互作用，以便在$αΛΛ$三体模型中再现从乳胶实验中提取的$^6_{ΛΛ}$ He的$B_{ΛΛ}$，NAGARA事件。在没有可调参数的情况下，用高斯展开法计算了$ααn ΛΛ$ Be基态和束缚激发态的$B_{ΛΛ}$.最近在KEK-E373实验中观测到的Hida事件被解释为对$^{11}_{ΛΛ}$ Be基态的观测。
英文摘要：
Energy levels of the double $Λ$ hypernucleus, $^{11}_{ΛΛ}$Be are calculated within the framework of an $ααn ΛΛ$ five-body model. Interactions between constituent particles are determined so as to reproduce reasonably the observed low-energy properties of the $αα$, $ααn$ nuclei and the existing data for $Λ$-binding energies of the $αΛ$, $ααΛ$, $αn Λ$ and $ααn Λ$ systems. An effective $ΛΛ$ interaction is constructed so as to reproduce, within the $αΛΛ$ three-body model, the $B_{ΛΛ}$ of $^6_{ΛΛ}$He, which was extracted from the emulsion experiment, the NAGARA event. With no adjustable parameters for the $ααn ΛΛ$ system, $B_{ΛΛ}$ of the ground and bound excited states of $^{11}_{ΛΛ}$Be are calculated with the Gaussian Expansion Method. The Hida event, recently observed at KEK-E373 experiment, is interpreted as an observation of the ground state of the $^{11}_{ΛΛ}$Be.
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