Investigation of K~(bar) NN resonances with a coupled-channel Complex Scaling Method + Feshbach projection

摘要

We have investigated a prototype of kaonic nuclei, “K~?pp”, with a coupledchannel Complex Scaling Method (ccCSM). Combining the ccCSM with Feshbach projection method, we can handle a coupled-channel problem effectively as a single-channel problem. By using an energy-dependent chiral SU(3)-based KN potential, the K~?pp (J~π = 0~? and T = 1/2) is obtained to be shallowly bound with the binding energy of 20-30 MeV. The mesonic decay width depends on the interaction parameters and ansatz; the decay width is ranging from 20 to 65 MeV. In case of J~π = 1~? state, no three-body KNN resonant states are found.