To bind or not to bind: Lambda-Lambda hypernuclei and Xi hyperons

Details To bind or not to bind: Lambda-Lambda hypernuclei and Xi hyperons To bind or not to bind: Lambda-Lambda hypernuclei and Xi hyperons

2002-11-22

arxiv.org/abs/nucl-th/0211070v1

Nucl.Phys. A721 (2003) 945-950

Physics

Nuclear Physics

Nuclear Theory

Parallel-session invited talk at PANIC'02, to appear in NPA

Scientific paper

10.1016/S0375-9474(03)01248-X

Four-body Faddeev-Yakubovsky calculations for Lambda-Lambda-p-n do not produce a bound state for Lambda-Lambda hydrogen 4, although suitably defined three-body Faddeev calculations for Lambda-Lambda-d produce a 1+ bound state for Lambda-Lambda interactions fitted to the Lambda-Lambda helium 6 emulsion event from KEK E373. This is opposite to the normal situation where a four-body Faddeev-Yakubovsky calculation yields stronger binding than that due to a suitably defined three-body Faddeev calculation. For stranger systems, Faddeev calculations using Lambda-Xi interactions which simulate the Nijmegen soft-core model NSC97 (which is close to reproducing the KEK event) suggest that Lambda-Xi helium 6 marks the onset of nuclear stability for Xi hyperons.

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