ΛNN Three-Body Force Due to Coherent Λ-Σ Coupling(Hadrons in Nuclei,New Frontiers in QCD 2010-Exotic Hadron Systems and Dense Matter-)
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概要
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The overbinding problem of ^5_ΛHe is solved by introducing a coherent Λ-Σ coupling which is equivalent to ΛNN three-body force. This three-body force is coherently enhanced in the 0^+ states of ^4_ΛH and ^4_ΛH. The 0^+-1^+ splitting in these hypernuclei is mainly due to the coherent Λ-Σ coupling and partly due to the ΛN spin-spin interaction. A ΛNN three-body potential is derived from the coupled-channel treatment. The origin of repulsive and attractive nature of the three-body force is discussed. The coherent Λ-Σ coupling effect becomes important in neutron-rich hypernuclei. A possible "hyperheavy hydrogen", ^6_ΛH, would provide another evidence of the coherent Λ-Σ coupling.
- 2010-12-17
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