{
  "annotation_id": "81c31494-abbe-4484-bd69-a8585b1ff3a4",
  "date_created": "2026-03-02T18:00:01.496000Z",
  "date_modified": "2026-03-02T18:00:01.496000Z",
  "file_hash": "fd76b162ece33c7ffd01470fba4ab72a558b0dd3f5167bb453006a72b777c9c4",
  "private": false,
  "record": {
    "abstract": "I solve the Relativistic Navier Stokes Equations assuming boost invariance\nand rotational symmetry. I compare the resulting numerical solutions for two\nlimiting models of the shear viscosity. In the first model the shear viscosity\nis made proportional to the temperature. Thus, $\\eta \\propto T/\\sigma_0$ where\n$\\sigma_0$ is some fixed cross section (perhaps $\\sigma_0 \\sim\n\\Lambda_{QCD}^{-2}$) . This viscosity model is typical of the classical\nBoltzmann simulations of Gyulassy and Molnar. In the second model the shear\nviscosity is made proportional to $T^3$. This model is typical of high\ntemperature QCD. When the initial mean free path of the $T^3$ model is four\ntimes larger than the $T/\\sigma_0$ model, the two models of viscosity produce\nthe same radial flow. This result can be understood with simple scaling\narguments. Thus, the large transport opacity needed in classical Boltzmann\nsimulations is in part an artifact of the fixed scale $\\sigma_0$ in these\nmodels.",
    "arxiv_id": "nucl-th/0403053",
    "authors": [
      "D. Teaney"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1088/0954-3899/30/8/100",
    "journal_ref": "J.Phys.G30:S1247-S1250,2004",
    "title": "Viscosity and Thermalization",
    "url": "https://arxiv.org/abs/nucl-th/0403053"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6e612833-79e0-4afd-b7e8-e1ff65497e87",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}