Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1996-05-02
Nucl.Phys. B478 (1996) 629-659
Physics
Nuclear Physics
Nuclear Theory
Revised discussion of power counting in the EFT expansion. Tex file uses harvmac, epsf macros, 35 pages with 9 postscript figu
Scientific paper
10.1016/0550-3213(96)00357-4
We perform a nonperturbative 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 no a chiral expansion in powers of the pion mass. We use dimensional regularization throughout and the MS-bar subtraction scheme; our final result depends only on physical observables. We show that the EFT expansion of the quantity |p|cot delta(p) converges at momenta much greater than the scale 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.
Kaplan David B.
Savage Martin J.
Wise Mark B.
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