{
  "annotation_id": "9eb9520b-b9e4-410a-ae77-a385fc73283f",
  "date_created": "2026-03-02T18:00:08.130000Z",
  "date_modified": "2026-03-02T18:00:08.130000Z",
  "file_hash": "2ce83013daebbb1e65899fecbac4fd15131afb8ac35c3525c5fe9ba51f92cefb",
  "private": false,
  "record": {
    "abstract": "We show that in collisions with neutron rich heavy ions at energies around\nthe production threshold K^0 and K^+ yields might probe the isospin dependent\npart of the nuclearEquation of State (EoS) at high baryon densities. In\nparticular we suggest the K^0/K^+ ratio as a promising observable. Results\nobtained in a fully covariant relativistic transport approach are presented for\ncentral Au+Au collisions in the beam energy range 0.8-1.8~AGeV. The focus is\nput on the EoS influence which goes beyond the \"collision-cascade\" picture. The\nisovector part of the in-medium interaction affects the kaon multiplicities via\ntwo mechanisms: i) a \"symmetry potential\" effect, i.e. a larger neutron\nrepulsion in n-rich systems (isospin fractionation); ii) a \"threshold\" effect,\ndue to the change in the self-energies of the particles involved in inelastic\nprocesses. Genuine relativistic contributions are revealed, that could allow to\ndirectly ``measure\u0027\u0027 the Lorentz structure of the effective isovector\ninteraction.",
    "arxiv_id": "nucl-th/0607005",
    "authors": [
      "G. Ferini",
      "T. Gaitanos",
      "M. Colonna",
      "M. Di Toro",
      "H. H. Wolter"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevLett.97.202301",
    "journal_ref": "Phys.Rev.Lett.97:202301,2006",
    "title": "Isospin effects on sub-threshold kaon production at intermediate   energies",
    "url": "https://arxiv.org/abs/nucl-th/0607005"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2b3b3fa4-1690-43c5-9288-c02eb79980df",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}