Nucleon–nucleon resonances at intermediate energies using a complex energy formalism

We apply our method of complex scaling, valid for a general class of potentials, in a search for nucleon–nucleon S-matrix poles up to 2 GeV laboratory kinetic energy. We find that the realistic potentials JISP16, constructed from inverse scattering, and chiral field theory potentials N 3 LO and N 2 LO opt support resonances in energy regions well above their fit regions. In some cases these resonances have widths that are small when compared with the real part of the S-matrix pole