CCAST, World Lab, Beijing 100080, Peoples R China
; Inst High Energy Phys, Beijing 100049, Peoples R China
; Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
The structure of the moleculelike state of NK pi with spin-parity J(pi) = (3-)/(2) and isospin I = 1 is studied within the chiral SU( 3) quark model. First we calculate the NK, N pi, and K pi phase shifts in the framework of the resonating group method, and a qualitative agreement with the experimental data is obtained. Then we perform a rough estimation for the energy of ( NK pi)(J pi = 3-/2, I= 1), and the effect of the mixing to the configuration (Delta K)(J pi = 3-/2, I= 1) is also considered. The calculated energy is very close to the threshold of the NKp system. A detailed investigation is worth doing in the further study.