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A momentum subtraction scheme for two-nucleon effective field theory

Authors
Journal
Physics Letters B
0370-2693
Publisher
Elsevier
Publication Date
Volume
445
Identifiers
DOI: 10.1016/s0370-2693(98)01470-1
Disciplines
  • Mathematics

Abstract

Abstract 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 μ 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 π .

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