The Delta-Delta Intermediate State in 1S0 Nucleon-Nucleon Scattering From Effective Field Theory

Abstract

We examine the role of the Delta-Delta intermediate state in low energy NN scattering using effective field theory. Theories both with and without pions are discussed. They are regulated with dimensional regularization and MSbar subtraction. We find that the leading effects of the Delta-Delta state can be absorbed by a redefinition of the contact terms in a theory with nucleons only. It does not remove the requirement of a higher dimension operator to reproduce data out to moderate momentum. The explicit decoupling of the Delta-Delta state is shown for the theory without pions.

16 pages, 3 figures, uses harvmac

References in corpus (5)

• Nucleon-Nucleon Scattering from Effective Field Theory
• How short is too short? Constraining zero-range interactions in nucleon-nucleon scattering
• The Spin-Flavor Dependence of Nuclear Forces from Large-N QCD
• The $pp\to pp{\pi }^0$ Reaction near Threshold: A Chiral Power Counting Approach
• Regularization, Renormalization and Range: The Nucleon-Nucleon Interaction from Effective Field Theory

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