$^3_\eta He$ nucleus modeling in the frame optical potential model

Abstract

The conditions, at which quasi-bound $\eta-^{3}$He state is possible, have been investigated and compared with the available findings about $\eta$N-scattering length and the information about $^{3}$He nucleus from references. We conclud that the existence of quasi-bound $\eta-^{3}$He state within the framework of the optical potential model, which doesn`t contradict all collected findings, is not possible, but the observing anomaly of $\eta^{3}$He-interaction at low energies is a virtual state.