Triangular flow of negative pions emitted in PbAu collisions at top SPS energy
University of Belgrade and Vinca Institute of Nuclear Sciences, M. Petrovica Alasa 12-14, 11001 Belgrade, Serbia
a e-mail: Jovan.Milosevic@cern.ch
Published online: 5 December 2017
The CERES/NA45 experiment measured for the first time triangular flow (ν3) as a function of transverse momentum (pT) of negative pions emitted around midrapidity in central PbAu collisions at = 17.3 GeV. The ν3, determined within 0.05 < pT < 2 GeV/c, is corrected for the HBT effects. It is shown that the triangular flow magnitude is smaller by a factor of about 2 than the one measured by the PHENIX experiment at RHIC and the ALICE experiment. Within the analyzed centrality bins, the ν3 does not shows significant centrality dependence. The obtained ν3(pT) dependence is well described by a viscous hydrodynamic calculation combined with an UrQMD cascade model in the late stages of the collision.
© The Authors, published by EDP Sciences, 2017
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