{
  "id": "1207.3272",
  "version": "v2",
  "published": "2012-07-13T15:00:11.000Z",
  "updated": "2012-07-18T14:03:15.000Z",
  "title": "Collective properties of nucleus-nucleus collisions from AGS to LHC energies",
  "authors": [
    "V. P. Konchakovski",
    "V. D. Toneev",
    "W. Cassing",
    "E. L. Bratkovskaya",
    "S. A. Voloshin",
    "V. Voronyuk"
  ],
  "comment": "Proceedings of 28th Winter Workshop on Nuclear Dynamics in Dorado del Mar, Puerto Rico, 7-14 April, 2012. 9 pages, 4 figures",
  "categories": [
    "nucl-th",
    "hep-ph"
  ],
  "abstract": "The azimuthal anisotropies of the collective transverse flow of charged hadrons are investigated in a wide range of heavy-ion collision energies within the microscopic Parton-Hadron-String Dynamics (PHSD) transport approach which incorporates explicit partonic degrees-of-freedom in terms of strongly interacting quasiparticles (quarks and gluons) in line with an equation-of-state from lattice QCD as well as the dynamical hadronization and hadronic collision dynamics in the final reaction phase. The experimentally observed increase of the elliptic flow $v_2$ of charged hadrons with collision energy is successfully described in terms of the PHSD approach. The analysis of higher-order harmonics $v_3$ and $v_4$ in the azimuthal angular distribution shows a similar tendency of growing deviations between partonic and purely hadronic models with increasing collision energy. This demonstrates that the excitation functions of azimuthal anisotropies reflect the increasing role of quark-gluon degrees of freedom in the early phase of relativistic heavy-ion collisions. Furthermore, the specific variation of the ratio $v_4/(v_2)^2$ with respect to bombarding energy, centrality and transverse momentum is found to provide valuable information on the underlying partonic dynamics.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2012-07-18T14:03:15.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "nucleus-nucleus collisions",
      "lhc energies",
      "collective properties",
      "collision energy",
      "incorporates explicit partonic degrees-of-freedom"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/1742-6596/389/1/012015",
      "journal": "Journal of Physics Conference Series",
      "year": 2012,
      "month": "Nov",
      "volume": 389,
      "number": 1,
      "pages": "012015"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1122559,
      "adsabs": "2012JPhCS.389a2015K"
    }
  }
}