arXiv subjects

Jovan Milosevic

Publications and source records attributed to Jovan Milosevic.

3 recordsLinked to original sources

arXiv2017

New results on collectivity with CMS

Nonlinear response coefficients of higher-order anisotropy harmonics for charged particles are measured in PbPb collisions at 2.76 and 5.02 TeV as a function of transverse momentum and collision centrality. The nonlinear response coefficients are obtained from $v_{n}$ harmonics measured with respect to their own plane and the mixed harmonics. Additionally, at 5.02 TeV PbPb collisions, a significant negative skewness is observed by a fine splitting between $v_{2}\{4\}$ and $v_{2}\{6\}$ cumulants. The elliptic flow skewness is measured up to 60\% centrality. The results are compared with hydrodynamic models with different shear viscosity to entropy density ratios and initial conditions.

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arXiv2016

Triangular flow of negative pions emitted in PbAu collisions at $\sqrt{s_{NN}} = $ 17.3 GeV

Differential triangular flow, $v_3(p_T)$, of negative pions is measured at $\sqrt{s_{NN}}$= 17.3 GeV around midrapidity by the CERES/NA45 experiment at CERN in central PbAu collisions in the range 0-30\% with a mean centrality of 5.5\%. This is the first measurement as a function of transverse momentum of the triangular flow at SPS energies. The $p_T$ range extends from about 0.05 GeV/c to more than 2 GeV/c. The triangular flow magnitude, corrected for the HBT effects, is smaller by a factor of about 2 than the one measured by the PHENIX experiment at RHIC and the ALICE experiment at the LHC. Within the analyzed range of central collisions no significant centrality dependence is observed. The data are found to be well described by a viscous hydrodynamic calculation combined with an UrQMD cascade model for the late stages.

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arXiv2006

Strange Particle Production and Elliptic Flow from CERES

Elliptic flow measurements as a function of p_T of charged (pi^+- and low-p_T protons) and strange (Lambda and K^0_S) particles from Pb+Au collisions at 158 AGeV/c are presented, together with measurements of phi and K^0_S meson production. A mass ordering effect was observed. Scaling to the number of constituent quarks and transverse rapidity y^fs_T scaling are presented. The results are compared with results from the NA49 and STAR experiments and with hydrodynamical calculations. For the first time in heavy-ion collisions, phi mesons were reconstructed in the same experiment both in the K^+K^- and in the e^+e^- decay channels. The obtained transverse mass distributions of phi mesons are compared with results from the NA49 and NA50 experiments. The yield and the inverse slope parameter of the K^0_S mesons were reconstructed from two independent analyses. Our results are compared with those from the NA49 and NA57 experiments.

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