. "155527" . . . . "12" . . . "109" . . "Observation of Direct-Photon Collective Flow in Au+Au Collisions at root sNN=200 GeV" . "The second Fourier component v2 of the azimuthal anisotropy with respect to the reaction plane is measured for direct photons at midrapidity and transverse momentum (pT) of 1-12\u2009\u2009GeV/c in Au+Au collisions at root sNN=200 GeV. Previous measurements of this quantity for hadrons with pT<6 GeV/c indicate that the medium behaves like a nearly perfect fluid, while for pT>6\u2009\u2009GeV/c a reduced anisotropy is interpreted in terms of a path-length dependence for parton energy loss. In this measurement with the PHENIX detector at the Relativistic Heavy Ion Collider we find that for pT>4 GeV/c the anisotropy for direct photons is consistent with zero, which is as expected if the dominant source of direct photons is initial hard scattering."@en . "0031-9007" . "Observation of Direct-Photon Collective Flow in Au+Au Collisions at root sNN=200 GeV" . "RIV/68407700:21340/12:00196399!RIV13-MSM-21340___" . "Vrba, V\u00E1clav" . "7"^^ . . "photon: direct production; jet: fragmentation; angular distribution: anisotropy; path length: dependence; photon: thermal; PHENIX"@en . . . "Observation of Direct-Photon Collective Flow in Au+Au Collisions at root sNN=200 GeV"@en . "000308878500006" . "[F1BA61925979]" . . "21340" . . "I, P(LA08015)" . . . . "Adare, A." . "385"^^ . "Virius, Miroslav" . "RIV/68407700:21340/12:00196399" . "Observation of Direct-Photon Collective Flow in Au+Au Collisions at root sNN=200 GeV"@en . "10.1103/PhysRevLett.109.122302" . . . "Kr\u00E1l, A." . . "The second Fourier component v2 of the azimuthal anisotropy with respect to the reaction plane is measured for direct photons at midrapidity and transverse momentum (pT) of 1-12\u2009\u2009GeV/c in Au+Au collisions at root sNN=200 GeV. Previous measurements of this quantity for hadrons with pT<6 GeV/c indicate that the medium behaves like a nearly perfect fluid, while for pT>6\u2009\u2009GeV/c a reduced anisotropy is interpreted in terms of a path-length dependence for parton energy loss. In this measurement with the PHENIX detector at the Relativistic Heavy Ion Collider we find that for pT>4 GeV/c the anisotropy for direct photons is consistent with zero, which is as expected if the dominant source of direct photons is initial hard scattering." . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . . . "Physical Review Letters" . . "2"^^ . "http://link.aps.org/doi/10.1103/PhysRevLett.109.122302" . "Li\u0161ka, Tom\u00E1\u0161" .