Universality of isolated N-body resonances at large scattering length

Non-Efimovian N-body resonances are investigated in the regime of a large two-body s-wave scattering length. In view of a universal description of low-energy bound and quasibound states, a contact model is introduced. The modeling requires two parameters in addition to the scattering length. Using a modified scalar product, the contact model provides a normalization of bound states, possibly not square integrable, that coincides with that of the corresponding finite range model.

Automated summary

In this study, non-Efimovian N-body resonances are investigated in the regime of a large two-body s-wave scattering length, and a contact model is introduced to describe low-energy bound and quasibound states.