K¯NN quasibound state and the K¯N interaction: Coupledchannels Faddeev calculations of the K¯NNπΣN system
Abstract
Coupledchannels threebody calculations of an I=1/2,J^{π}=0^{} K¯NN quasibound state in the K¯NNπΣN system were performed and the dependence of the resulting threebody energy on the twobody K¯NπΣ interaction was investigated. Earlier results of binding energy B_{Kpp}~5070 MeV and width Γ_{Kpp}~100 MeV are confirmed [N. V. Shevchenko , Phys. Rev. Lett. 98, 082301 (2007)]. It is shown that a suitably constructed energyindependent complex K¯N potential gives a considerably shallower and narrower threebody quasibound state than the full coupledchannels calculation. Comparison with other calculations is made.
 Publication:

Physical Review C
 Pub Date:
 October 2007
 DOI:
 10.1103/PhysRevC.76.044004
 arXiv:
 arXiv:0706.4393
 Bibcode:
 2007PhRvC..76d4004S
 Keywords:

 21.45.+v;
 11.80.Jy;
 13.75.Jz;
 24.10.Eq;
 Fewbody systems;
 Manybody scattering and Faddeev equation;
 Kaonbaryon interactions;
 Coupledchannel and distortedwave models;
 Nuclear Theory
 EPrint:
 22 pages, 7 figures, 4 tables