{
  "id": "0802.2579",
  "version": "v2",
  "published": "2008-02-19T02:36:33.000Z",
  "updated": "2009-03-05T07:22:53.000Z",
  "title": "Centrality dependence of $p_{T}$ spectra for identified hadrons in Au+Au and Cu+Cu collisions at $\\sqrt{s_{NN}}= 200$ GeV",
  "authors": [
    "Yun-fei Wang",
    "Feng-lan Shao",
    "Jun Song",
    "De-ming Wei",
    "Qu-bing Xie"
  ],
  "comment": "7 pages, 6 figures",
  "journal": "Chinese Physics C32, 976 (2008)",
  "categories": [
    "hep-ph"
  ],
  "abstract": "The centrality dependence of transverse momentum spectra for identified hadrons at midrapidity in Au+Au collisions at $\\sqrt{s_{NN}}= 200$ GeV is systematically studied in a quark combination model. The $\\mathrm{{p}_{T}}$ spectra of $\\pi^{\\pm}$, $K^{\\pm}$, $p(\\bar{p})$ and $\\Lambda(\\bar{\\Lambda})$ in different centrality bins and the nuclear modification factors ($R_{CP}$) for these hadrons are calculated. The centrality dependence of the average collective transverse velocity $<\\beta (r)>$ for the hot and dense quark matter is obtained in Au+Au collisions, and it is applied to a relative smaller Cu+Cu collision system. The centrality dependence of $\\mathrm{{p}_{T}}$ spectra and the $R_{CP}$ for $\\pi^{0}$, $K_{s}^{0}$ and $\\Lambda$ in Cu+Cu collisions at $\\sqrt{s_{NN}}= 200$ GeV are well described. The results show that $<\\beta (r)>$ is only a function of the number of participants $N_{part}$ and it is independent of the collision system.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2009-03-05T07:22:53.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "25.75.Nq",
      "25.75.Ld",
      "25.75.-q"
    ],
    "keywords": [
      "centrality dependence",
      "identified hadrons",
      "collision system",
      "nuclear modification factors",
      "transverse momentum spectra"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/1674-1137/32/12/007",
      "journal": "Chinese Physics C",
      "year": 2008,
      "month": "Dec",
      "volume": 32,
      "number": 12,
      "pages": 976
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 779665,
      "adsabs": "2008ChPhC..32..976W"
    }
  }
}