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Nucleon-nucleon scattering from effective field theory

1996; Elsevier BV; Volume: 478; Issue: 3 Linguagem: Inglês

10.1016/0550-3213(96)00357-4

1873-1562

David B. Kaplan, Martin J. Savage, Mark B. Wise,

Nuclear physics research studies

We perform a non-perturbative calculation of the 1S0 NN 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 MS renormalization scheme; our final result depends only on physical observables. We show that the EFT expansion of the quantity |p| cotθ(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.