Off-shell effects and consistency of many-body treatments of dense matter
arXiv:nucl-th/0208066 · doi:10.1103/PhysRevC.67.031301
Abstract
Effective field theory requires all observables to be independent of the representation used for the quantum field operators. It means that off-shell properties of the interactions should not lead to any observable effects. We analyse this issue in the context of many-body approaches to nuclear matter, where it should be possible to shift the contributions of lowest order in purely off-shell two-body interactions into three-body forces. We show that none of the commonly used truncations of the two-body scattering amplitude such as the ladder, Brueckner-Hartree-Fock or parquet approximations respect this requirement.
5 pages, RevTeX, 6 figures
References in corpus (4)
Cited by in corpus (8)
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