A momentum subtraction scheme for two--nucleon effective field theory

Details A momentum subtraction scheme for two--nucleon effective field theory A momentum subtraction scheme for two--nucleon effective field theory

1998-09-22

arxiv.org/abs/nucl-th/9809071v1

Phys.Lett. B445 (1999) 378-386

Physics

Nuclear Physics

Nuclear Theory

12 pages, 3 figs

Scientific paper

10.1016/S0370-2693(98)01470-1

We introduce a momentum subtraction scheme which obeys the power counting of Kaplan, Savage, and Wise (KSW), developed for systems with large scattering lengths, $a$. Unlike the power divergence subtraction scheme, coupling constants in this scheme obey the KSW scaling for all $\mu_R > 1/a$. We comment on the low-energy theorems derived by Cohen and Hansen. We conclude that there is no obstruction to using perturbative pions for momenta $p>m_\pi$.

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