Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2007-06-29
Phys.Rev.C76:044004,2007
Physics
Nuclear Physics
Nuclear Theory
22 pages, 7 figures, 4 tables; minor corrections, accepted for publication in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.76.044004
Coupled-channel three-body calculations of an $I=1/2$, $J^{\pi}=0^-$ $\bar{K}NN$ quasi-bound state in the $\bar{K}NN - \pi \Sigma N$ system were performed and the dependence of the resulting three-body energy on the two-body $\bar{K}N - \pi \Sigma$ interaction was investigated. Earlier results of binding energy $B_{K^-pp} \sim 50 -70$ MeV and width $\Gamma_{K^-pp} \sim 100$ MeV are confirmed [N.V. Shevchenko {\it et al.}, Phys. Rev. Lett. {\bf 98}, 082301 (2007)]. It is shown that a suitably constructed energy-independent complex $\bar{K}N$ potential gives a considerably shallower and narrower three-body quasi-bound state than the full coupled-channel calculation. Comparison with other calculations is made.
Gal Asaf
Mare{š} Ji{ř}{\'ı} J.
Révai János
Shevchenko N. V.
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