K~-pp STUDIED WITH COUPLED-CHANNEL COMPLEX SCALING METHOD

摘要

We introduce the recent status of theoretical studies of the most essential kaonic nucleus K~-pp. The calculated binding energy and decay width are strongly dependent on theoretical models. In particular, there is a large discrepancy between the results of a variational calculation and a Faddeev calculation, in spite that KN potentials used in both calculations are constrained by chiral SU(3) theory. This discrepancy is expected to be caused by π∑N three-body dynamics which might be missing in the variational calculation. In order to consider this issue, we propose "Coupled-channel Complex Scaling Method" which can be regarded as an extended method of the variational scheme.