{
  "id": "1504.01289",
  "version": "v1",
  "published": "2015-04-06T14:28:11.000Z",
  "updated": "2015-04-06T14:28:11.000Z",
  "title": "Measurement of the correlation between flow harmonics of different order in lead-lead collisions at $\\sqrt{s_{NN}}$=2.76 TeV with the ATLAS detector",
  "authors": [
    "ATLAS Collaboration"
  ],
  "comment": "22 pages plus author list + cover pages (35 pages total), 16 figures, submitted to Phys. Rev. C., All figures including auxiliary figures can be found at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2014-03/",
  "categories": [
    "hep-ex",
    "nucl-ex"
  ],
  "abstract": "Correlations between the elliptic or triangular flow coefficients $v_m$ ($m$=2 or 3) and other flow harmonics $v_n$ ($n$=2 to 5) are measured using $\\sqrt{s_{NN}}=2.76$ TeV Pb+Pb collision data collected in 2010 by the ATLAS experiment at the LHC, corresponding to an integrated lumonisity of 7 $\\mu$b$^{-1}$. The $v_m$-$v_n$ correlations are measured in midrapidity as a function of centrality, and, for events within the same centrality interval, as a function of event ellipticity or triangularity defined in a forward rapidity region. For events within the same centrality interval, $v_3$ is found to be anticorrelated with $v_2$ and this anticorrelation is consistent with similar anticorrelations between the corresponding eccentricities $\\epsilon_2$ and $\\epsilon_3$. On the other hand, it is observed that $v_4$ increases strongly with $v_2$, and $v_5$ increases strongly with both $v_2$ and $v_3$. The trend and strength of the $v_m$-$v_n$ correlations for $n$=4 and 5 are found to disagree with $\\epsilon_m$-$\\epsilon_n$ correlations predicted by initial-geometry models. Instead, these correlations are found to be consistent with the combined effects of a linear contribution to $v_n$ and a nonlinear term that is a function of $v_2^2$ or of $v_2v_3$, as predicted by hydrodynamic models. A simple two-component fit is used to separate these two contributions. The extracted linear and nonlinear contributions to $v_4$ and $v_5$ are found to be consistent with previously measured event-plane correlations.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-04-06T14:28:11.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "25.75.Dw"
    ],
    "keywords": [
      "flow harmonics",
      "correlation",
      "lead-lead collisions",
      "atlas detector",
      "centrality interval"
    ],
    "publication": {
      "doi": "10.1103/PhysRevC.92.034903"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 22,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1357991
    }
  }
}