Roles of the N(1535) and a0(980) in the process Λc+→ π +ηn

We have investigated the process A+ c -> pi+eta n by taking into account the contributions from the nucleon resonance N(1535) and the scalar meson a0(980), which could be dynamically generated by the interaction of the S-wave pseudoscalar meson-octet baryon and the S-wave pseudoscalar meson-pseudoscalar meson, respectively. Our results show that, in eta n invariant mass distribution, there is a significant near-threshold enhancement structure, which could be associated with N(1535). On the other hand, one can find a clear cusp structure of a0(980) in pi +eta invariant mass distribution. We further estimate the ratio R = B(A+ c -> a0(980)+n)/B(A+ c -> pi +eta n) approximate to 0.313. Our results can be tested by BESIII, Belle II, and the proposed Super Tau-Charm Facility experiments in the future.