Structure of 10ΛBe and 10ΛB Hypernuclei Studied with the Four-Body Cluster Model

E. Hiyama, Y. Yamamoto
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引用次数: 33

Abstract

The structure of the isodoublet hypernuclei, 10 Ba nd 10 Be within the framework of an α + α + Λ + N four-body cluster model is studied. Interactions between the constituent subunits are determined to reproduce reasonably well the observed low-energy properties of the αα, αN , αΛ, ααΛ ,a ndααN subsystems. Furthermore, the two-body ΛN interaction is adjusted to reproduce the 0 + -1 + splitting of 4H. The Λ binding energies of 10 Ba nd 10 Be are 8.76 MeV and 8.94 MeV, respectively. The energy splitting of the 1 − -2 − levels in 10 Bi s 0.08 MeV, which does not contradict the experimental report in BNL-E930. An even-state ΛN charge symmetry breaking (CSB) interaction determined from the A = 4 systems works repulsively by +0.1 MeV (attractively by �0. 1M eV) in 10 Be ( 10 B). We discuss a possibility that an odd-state CSB interaction improves the fitting to the experimental data of A =1 0 double Λ hypernuclei. Subject Index: 214
用四体簇模型研究10ΛBe和10ΛB超核的结构
在α + α + Λ + N四体簇模型框架内研究了等重态超核10ba和10be的结构。确定了组成亚基之间的相互作用可以较好地再现αα, αN, αΛ, ααΛ,a和αα n子系统所观察到的低能性质。此外,调整了两体ΛN相互作用以再现4H的0 + -1 +分裂。10ba和10be的Λ结合能分别为8.76 MeV和8.94 MeV。10 Bi中1−-2−能级的能量分裂为0.08 MeV,这与BNL-E930的实验报告不矛盾。偶态ΛN电荷对称破缺(CSB)相互作用由A = 4系统确定,斥力为+0.1 MeV(吸引力为- 0 MeV)。我们讨论了奇态CSB相互作用改善a = 10双Λ超核实验数据拟合的可能性。科目索引:214
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Progress of Theoretical Physics
Progress of Theoretical Physics 物理-物理:综合
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