  The effect nucleon dressing by scattering on the pairing gap in nuclear
matter is discussed. Numerical results from self-consistent T-matrix
calculations are compared to quasi-particle approximations. The dominant effect
of scattering can be accounted for by a renormalization of the quasi-particle
strength. The exponential sensitivity of the pairing gap and the critical
temperature on the pairing strength makes it strongly dependent on many-body
effects.
