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Prog. Theor. Phys. Supplement No. 186 (2010) pp. 378-383

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ΛNN Three-Body Force Due to Coherent Λ-Σ Coupling

Yoshinori Akaishi

RIKEN Nishina Center, Wako 351-0198, Japan

Abstract:

The overbinding problem of 5ΛHe 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 4ΛH and 4ΛHe. 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", 6ΛH, would provide another evidence of the coherent Λ-Σ coupling.


URL : http://ptp.ipap.jp/link?PTPS/186/378/
DOI : 10.1143/PTPS.186.378

[ Full Text PDF : OPEN SELECT (388K) ] Citation:

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