{
  "annotation_id": "a3ab2a81-d921-4952-aa21-4ad274f64692",
  "date_created": "2026-03-02T18:00:08.064000Z",
  "date_modified": "2026-03-02T18:00:08.064000Z",
  "file_hash": "6d6722b5a02d51773c4ec128cb1ec960e58754e141784856935c16b9a5b9d107",
  "private": false,
  "record": {
    "abstract": "We calculate the density-dependent spin-isospin asymmetry energy $J(k_f)$ of\nnuclear matter in the three-loop approximation of chiral perturbation theory.\nThe interaction contributions to $J(k_f)$ originate from one-pion exchange,\niterated one-pion exchange, and irreducible two-pion exchange with no, single,\nand double virtual $\\Delta$-isobar excitation. We find that the approximation\nto $1\\pi$-exchange and iterated $1\\pi$-exchange terms (which leads already to a\ngood nuclear matter equation of state by adjusting an emerging contact-term) is\nspin-isospin stable, since $J(k_{f0})\\simeq 24 {\\rm MeV}\u003e0$. The inclusion of\nthe chiral $\\pi N\\Delta$-dynamics, necessary in order to guarantee the\nspin-stability of nuclear matter, keeps this property intact. The corresponding\nspin-isospin asymmetry energy $J(k_f)$ stays positive even for extreme values\nof an undetermined short-distance parameter $J_5$ (whose possible range we\nestimate from realistic NN-potentials). The largest positive contribution to\n$J(k_f)$ (a term linear in density) comes from a two-body contact-term with its\nstrength fitted to the empirical nuclear matter saturation point.",
    "arxiv_id": "nucl-th/0601102",
    "authors": [
      "N. Kaiser"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.72.014007",
    "journal_ref": "Phys.Rev. C72 (2005) 014007",
    "title": "Spin-isospin stability of nuclear matter",
    "url": "https://arxiv.org/abs/nucl-th/0601102"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1592f52d-1ee3-43a7-a951-50bbd659d81b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}