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Off-shell effects in nuclear matter from an EFT point of view.

Authors
Publication Date
Keywords
  • Nuclear Model (Many-Body
  • Many-Body Approaches To Nuclear Matter)
  • Field Theory
  • Nuclear Matter (Off-Shell Effects In Nuclear Matter From Effective Field Theory Point Of View)
Disciplines
  • Physics

Abstract

Effective field theory requires all observables to be independent of the representation used for the quantum field operators. Off-shell parts of the in-medium vertex functions depend on the particular representation so that off-shell properties of the interactions should not lead to any observable effects. We analyze this issue in the context of many-body approaches to nuclear matter, where it should be possible to shift into three-body force the contributions from purely off-shell two-body interactions. None of the commonly used truncations of the two-body scattering amplitude such as the ladder, Brueckner-Hartree-Fock or parquet approxns. respect this requirement. [on SciFinder (R)]

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