.Lazy experimentalists models of resonance scattering: the role of overlapping Feshbach resonances and near degenerate continua.

Theoretical treatment of resonance interaction, which provides a key ingredient in modern research with ultracold atomic gases, is relatively complex because many collisional channels are usually involved. I will describe a lazy experimentalist's approach to deal with these complications and show that the well-established coupled-channel calculation phenomenology of lithium can be qualitatively reproduced, illuminating its particularities. This approach can be readily extended to other atomic species.