Azimuthal anisotropy correlations and fluctuations in PbPb collisions at the LHC energies from HYDJET++ and AMPT model

4 Nov 2019, 17:40
20m
Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Collective dynamics and final state interaction Poster Session

Speaker

Dr Jovan Milosevic (Vinca Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11351 Vinca, Belgrade, Serbia)

Description

Flow correlations and fluctuations are sensitive probes to the initial geometry and the quark-gluon plasma (QGP) in relativistic heavy ion collisions. Model comparisons are essential to decipher the properties of the QGP. In this talk, we study the correlations between flow harmonics $v_2$, $v_3$, and $v_4$ over a wide centrality range with two-particle correlations in PbPb collisions at $\sqrt{s_{_{\mathrm{NN}}}}=2.76$ TeV simulated by the HYDJET++ and AMPT models. We compare the model results to the experimental data from ATLAS and find both models are in good agreement with data for $v_2$-$v_3$ correlation. For $v_2$-$v_4$ and $v_3$-$v_4$ correlations, while AMPT is still in good agreement, HYDJET++ gives stronger slopes in the correlations than the ATLAS data. The AMPT model qualitatively predicts a boomerang-like shape in the correlations as observed in the experimental data, however, they quantitatively disagree. The HYDJET++ model fails completely to reproduce such a boomerang shape. We study flow fluctuations by the $v_2$ obtained with different Q-cumulant orders, namely $v_2\{2\}, v_2\{4\}, v_2\{6\},$ and $v_2\{8\}$. In particular, we study the skewness, a measure of the asymmetry of the $v_2$ distribution, by the ratio of
$v_{2}\{6\} - v_{2}\{8\}$ and $v_{2}\{4\} - v_{2}\{6\}$. The HYDJET++ model
calculation shows good agreement with results reported by the CMS and ALICE
experiments. However, more data statistics are needed in order to draw firm
conclusions.

Primary author

Dr Jovan Milosevic (Vinca Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11351 Vinca, Belgrade, Serbia)

Co-authors

Dr Predrag Cirkovic (Vinca Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11351 Vinca, Belgrade, Serbia) Dr Laslo Nadderd (Vinca Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11351 Vinca, Belgrade, Serbia) Prof. Fuqiang Wang (Department of physics and astronomy, Purdue University, Indiana 47907, USA) Dr Xiangrong Zhu (College of Science, Huzhou University, Huzhou, 313000, P. R. China) Dr Milos Dordevic (Vin\v{c}a Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11351 Vinca, Belgrade, Serbia) Milan Stojanovic (Vin\v{c}a Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11351 Vinca, Belgrade, Serbia)

Presentation Materials

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