S=-2 Hypernuclear Structure(Chapter II.,Hypernuclei and Baryon-Baryon Interaction)

概要

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The structure of light hypernuclei with strangeness S=-2 is investigated with the three-, four-, and five-body cluster model and the Gaussian Expansion method (GEM). Energy levels of the double-Λ hypernuclei ^7_<ΛΛ>He, ^7_<ΛΛ>Li, ^8_<ΛΛ>Li, ^9_<ΛΛ>Li, ^9_<ΛΛ>Be, and ^<10>_<ΛΛ>Be are predicted with the framework of αxΛΛ four-body model, where x=n,p,d,t, ^3He, and α, respectively. Also, energy levels of the double Λ hypernucleus, ^<11>_<ΛΛ>Be are calculated within the framework of a ααnΛΛ five-body model. The Demachi-Yanagi event, identified as ^10_<ΛΛ>Be, is interpreted as an observation of its 2^+ state excited state. The Hida event, recently observed at KEK-E373 experiment, is interpreted as an observation of the ground state of the ^<11>_<ΛΛ>Be. Detailed structure calculations in ^<12>_<Ξ->Be, ^5_<Ξ->H, ^9_<Ξ->Li, ^7_<Ξ->H and ^10_<Ξ->Li are performed within the framework of the microscopic two-, three- and four-body cluster models. ^7_<Ξ->H and ^10_<Ξ->Li are predicted to have bound states.
2010-11-30