K¯NNquasibound state and theK¯Ninteraction: Coupled-channels Faddeev calculations of theK¯NN−πΣNsystem
N. V. Shevchenko, A. Gal, J. Mareš, J. Révai
Physical Review C
Coupled-channel three-body calculations of an I=1/2, J^π=0^- K̅NN quasi-bound state in the K̅NN - πΣ N system were performed and the dependence of the resulting three-body energy on the two-body K̅N - πΣ interaction was investigated. Earlier results of binding energy B_K^-pp∼ 50 -70 MeV and width Γ_K^-pp∼ 100 MeV are confirmed [N.V. Shevchenko et al., Phys. Rev. Lett. 98, 082301 (2007)]. It is shown that a suitably constructed energy-independent complex K̅N potential gives a considerably
... er and narrower three-body quasi-bound state than the full coupled-channel calculation. Comparison with other calculations is made.