S=-1 Hypernuclear Structure(Chapter II.,Hypernuclei and Baryon-Baryon Interaction)

概要

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The structure of light hypernuclei with strangeness S=-1 is investigated with the three- and four-body cluster model and the Gaussian Expansion method (GEM). Interesting phenomena such as shrinkage effect of the core nucleus and the halo and skin structure due to the glue-like role of Λ particle are demonstrated from the study of structure of ^6_ΛHe, ^7_ΛLi and ^<13>_ΛC. Precise three- and four-body cluster calculation of ^7_ΛHe, ^7_ΛLi, ^7_ΛBe, ^9_ΛBe and ^<13>_ΛC provide us with information about ΛN interaction such as spin-spin, spin-orbit, charge symmetry breaking term, etc., by comparing with the recent experimental data. Precise four-body calculation taking NNNΛ and NNNΣ for ^4_ΛH and ^4_ΛHe are performed and the role of Λ-Σ conversion and the size of the virtual Σ component in ^4_ΛH and ^4_ΛHe are discussed.
2010-11-30