A nuclear matter description based on quark structure of the nucleon and pion exchange
arXiv:0712.3661 · doi:10.1016/j.nuclphysa.2008.06.002
Abstract
We investigate the possibility to describe nuclear matter in an approach constrained by the prominent features of quantum chromodynamics. We mapped the in-medium nucleon self-energies of a point coupling relativistic mean-field model on self-energies obtained in effective theories of QCD. More precisely, the contributions to the nucleon self-energy have been separated into the short range part, driven principally by the quark structure of the nucleon described in a quark-diquark picture, and the long range part, dictated by pion dynamics and determined using in-medium chiral perturbation theory. A saturation point, although unrealistic, is obtained without any free parameter. A realistic description of nuclear matter saturation properties has been obtained with the inclusion of a small phenomenological correction term to the short range part of the self-energy.
Revised Version, 30 pages, 9 figures, 4 tables, Accepted for publication in Nuclear Physics A
References in corpus (13)
- NJL-model analysis of dense quark matter
- Chiral Dynamics in Nucleons and Nuclei
- Peripheral Nucleon-Nucleon Phase Shifts and Chiral Symmetry
- Accurate Nucleon-Nucleon Potential Based upon Chiral Perturbation Theory
- Chiral Dynamics and Nuclear Matter
- The Stability of Nuclear Matter in the Nambu-Jona-Lasinio Model
- The Nuclear Spin-Orbit Force in Chiral Effective Field Theories
- Covariant representations of the relativistic Brueckner T-matrix and the nuclear matter problem
- Saturation from nuclear pion dynamics
- Relativistic nuclear model with point-couplings constrained by QCD and chiral symmetry
- Nuclear mean field from chiral pion-nucleon dynamics
- The relativistic self-energy in nuclear dynamics
- Compatibility of QCD sum-rules and Hadron field theory in a dense medium