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

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

1996-11-12

arxiv.org/abs/nucl-th/9611022v1

Phys.Rev.C55:2185-2190,1997

Physics

Nuclear Physics

Nuclear Theory

16 pages, 3 figures, uses harvmac

Scientific paper

10.1103/PhysRevC.55.2185

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.

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