{
  "annotation_id": "26c88f9e-58ce-4578-be68-fb9ad03a8309",
  "date_created": "2026-03-02T18:00:15.474000Z",
  "date_modified": "2026-03-02T18:00:15.474000Z",
  "file_hash": "f70828f275d75e23705d29ceda6f0bb972b29168332568f096303671e7b541c7",
  "private": false,
  "record": {
    "abstract": "Within the finite-temperature Greens-function formalism we study the equation\nof state of a hot interacting pion gas at zero chemical potential. Employing\nrealistic $\\pi\\pi$ meson-exchange interactions we selfconsistently calculate\nthe in-medium single-pion selfenergy and the $\\pi\\pi$ scattering amplitude in\nthe quasiparticle approximation. These quantities are then used to evaluate the\nthermodynamic potential, $\\Omega_\\pi$(T), from which the state variables:\npressure-, entropy- and energy-density can be derived. In contrast to earlier\ncalculations based on the low-energy Weinberg Lagrangian we find an overall\nincrease as compared to the free-gas results. We also consider the possibility\nof a dropping $\\rho$-meson mass as suggested by the \u0027Brown-Rho Scaling\u0027 law.",
    "arxiv_id": "nucl-th/9510054",
    "authors": [
      "R. Rapp",
      "J. Wambach"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.53.3057",
    "journal_ref": "Phys.Rev.C53:3057-3068,1996",
    "title": "Equation of State of an Interacting Pion Gas with Realistic $\\pi$--$\\pi$   Interactions",
    "url": "https://arxiv.org/abs/nucl-th/9510054"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "bc3cf113-733f-4874-9483-99330469acf3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}