1 Ocak 2020 Dergi makalesi Açık Erişim

CERN İşbirliği

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    "description": "<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>", 
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      "title": "Physics Letters B", 
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    "title": "Measurement of the (anti-) He elliptic flow in Pb\u2013Pb collisions at"
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