Role of the N*(1535) in η' production

We study the near-threshold η' production mechanism in nucleon-nucleon and πN collisions under the assumption that subthreshold resonance N*(1535) is predominant. In an effective Lagrangian approach that gives a reasonable description to the pN→pNη and π-p→nη reactions, we find that the excitation of N*(1535) resonance from the t-channel π exchange makes the dominate contribution to the pN→pNη' process, and a value of 6.5 for the ratio of σ(pn→pnη') to σ(pp→ppη') is predicted. A strongcoupling strength of N*(1535) to η'N (gη'NN*2/4π=1.1) is extracted from a combined analysis to pp→ppη' and πN→Nη', and the possible implication to the intrinsic component of N*(1535) is explored.