Modified scalar product for the effective range approach: the molecular   contribution
  The modified scalar product which permits to restore the self-adjoint character of the effective range approach is derived for one-channel contact models where a more general internal structure is included. In the case of the effective range approach, the modified scalar product is interpreted in the light of a generic two-channel model for a narrow Feshbach resonance as a way to take into account implicitly the molecular contribution of the closed channel. 
Ludovic Pricoupenko (LPTMC)
quant-ph cond-mat.quant-gas