A NEW EXPANSION FOR NUCLEON-NUCLEON INTERACTIONS

We introduce a new and well defined power counting for the effective f ield theory describing nucleon-nucleon interactions. Because of the la rge NN scattering lengths it differs from other applications of chiral perturbation theory and is facilitated by introducing an unusual subt raction scheme and renormalization group analysis. Calculation to subl eading order in the expansion can be dune analytically, and we present the results for both the S-1(0) and S-3(1) - D-3(1) channels. (C) 199 8 Elsevier Science B.V.