{
  "id": "1202.2262",
  "version": "v2",
  "published": "2012-02-10T14:09:35.000Z",
  "updated": "2013-12-06T14:42:29.000Z",
  "title": "Quark-to-gluon composition of the quark-gluon plasma in relativistic heavy-ion collisions",
  "authors": [
    "F. Scardina",
    "M. Colonna",
    "S. Plumari",
    "V. Greco"
  ],
  "comment": "6 pages, 4 figures, version published in Phys.Lett. B724 (2013) 296",
  "journal": "Phys.Lett. B724 (2013) 296-300",
  "doi": "10.1016/j.physletb.2013.06.034",
  "categories": [
    "nucl-th",
    "hep-ph",
    "nucl-ex"
  ],
  "abstract": "We study the evolution of the quark-gluon composition of the plasma created in ultra-Relativistic Heavy-Ion Collisions (uRHIC's) employing a partonic transport theory that includes both elastic and inelastic collisions plus a mean fields dynamics associated to the widely used quasi-particle model. The latter, able to describe lattice QCD thermodynamics, implies a \"chemical\" equilibrium ratio between quarks and gluons strongly increasing as $T\\rightarrow T_c$, the phase transition temperature. Accordingly we see in realistic simulations of uRHIC's a rapid evolution from a gluon dominated initial state to a quark dominated plasma close to $T_c$. The quark to gluon ratio can be modified by about a factor of $\\sim 20$ in the bulk of the system and appears to be large also in the high $p_T$ region. We discuss how this aspect, often overflown, can be important for a quantitative study of several key issues in the QGP physics: shear viscosity, jet quenching, quarkonia suppression. Furthermore a bulk plasma made by more than $80\\%$ of quarks plus antiquarks provides a theoretical basis for hadronization via quark coalescence.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2013-12-06T14:42:29.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "25.75.Nq",
      "12.38.Mh"
    ],
    "keywords": [
      "quark-gluon plasma",
      "quark-to-gluon composition",
      "lattice qcd thermodynamics",
      "gluon dominated initial state",
      "ultra-relativistic heavy-ion collisions"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Physics Letters B",
      "year": 2013,
      "month": "Jul",
      "volume": 724,
      "number": "4-5",
      "pages": 296
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1088723,
      "adsabs": "2013PhLB..724..296S"
    }
  }
}