Chiral approach to nuclear matter: role of two-pion exchange with virtual delta-isobar excitation

@article{Fritsch2005ChiralAT,
  title={Chiral approach to nuclear matter: role of two-pion exchange with virtual delta-isobar excitation},
  author={S. Fritsch and N. Kaiser and W. Weise},
  journal={Nuclear Physics},
  year={2005},
  volume={750},
  pages={259-293}
}
We extend a recent three-loop calculation of nuclear matter by including the effects from two-pion exchange with single and double virtual Δ(1232)-isobar excitation. Regularization dependent short-range contributions from pion-loops are encoded in a few NN-contact coupling constants. The empirical saturation point of isospin-symmetric nuclear matter, E¯0=−16 MeV, ρ0=0.16 fm−3, can be well reproduced by adjusting the strength of a two-body term linear in density (and tuning an emerging three… Expand
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