We perform a non-perturbative calculation of the 1S 0NN scattering amplitude, using an effective field theory (EFT) expansion. The expansion we advocate is a modification of what has been used previously; it is not a chiral expansion in powers of mπ. We use dimensional regularization throughout, and the overlineMS renormalization scheme; our final result depends only on physical observables. We show that the EFT expansion of the quantity |p| cot θ( p) converges at momenta much greater than the scale A that characterizes the derivative expansion of the EFT Lagrangian. Our conclusions are optimistic about the applicability of an EFT approach to the quantitative study of nuclear matter.
Nuclear Physics B
- Pub Date:
- February 1996
- Nuclear Theory;
- High Energy Physics - Phenomenology
- Revised discussion of power counting in the EFT expansion. Tex file uses harvmac, epsf macros, 35 pages with 9 postscript figures