1 Ocak 2020 Dergi makalesi Açık Erişim

CERN İşbirliği

Citation Style Language JSON

{
  "DOI": "10.1016/j.physletb.2020.135414", 
  "abstract": "<p>The elliptic flow (${v}_{2}$) of (anti-)$^{3}$He is measured in Pb\u2013Pb collisions at $\\sqrt{{s}_{\\mathrm{NN}}}=5.02\\phantom{\\rule{0.25em}{0ex}}\\text{TeV}$ in the transverse-momentum (${p}_{T}$) range of 2\u20136 GeV/c for the centrality classes 0\u201320%, 20\u201340%, and 40\u201360% using the event-plane method. This measurement is compared to that of pions, kaons, and protons at the same center-of-mass energy. A clear mass ordering is observed at low ${p}_{T}$, as expected from relativistic hydrodynamics. The violation of the scaling of ${v}_{2}$ with the number of constituent quarks at low ${p}_{T}$, already observed for identified hadrons and deuterons at LHC energies, is confirmed also for (anti-)$^{3}$He. The elliptic flow of (anti-)$^{3}$He is underestimated by the Blast-Wave model and overestimated by a simple coalescence approach based on nucleon scaling. The elliptic flow of (anti-)$^{3}$He measured in the centrality classes 0\u201320% and 20\u201340% is well described by a more sophisticated coalescence model where the phase-space distributions of protons and neutrons are generated using the iEBE-VISHNU hybrid model with AMPT initial conditions.</p>", 
  "author": [
    {
      "family": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "container_title": "Physics Letters B", 
  "id": "105037", 
  "issued": {
    "date-parts": [
      [
        2020, 
        1, 
        1
      ]
    ]
  }, 
  "title": "Measurement of the (anti-) He elliptic flow in Pb\u2013Pb collisions at", 
  "type": "article-journal", 
  "volume": "805 C"
}