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arXiv · 1205.4934

QGP flow fluctuations and the characteristics of higher moments

D. J. Wang·L. P. Csernai·D. Strottman·Cs. Anderlik·Y. Cheng·D. M. Zhou·Y. L. Yan·X. Cai·B. H. Sa
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Abstract

The dynamical development of expanding Quark-gluon Plasma (QGP) flow is studied in a 3+1D fluid dynamical model with a globally symmetric, initial condition. We minimize fluctuations arising from complex dynamical processes at finite impact parameters and from fluctuating random initial conditions to have a conservative fluid dynamical background estimate for the statistical distributions of the thermodynamical parameters. We also avoid a phase transition in the equation of state, and we let the matter supercool during the expansion. Then central Pb+Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV are studied in an almost perfect fluid dynamical model, with azimuthally symmetric initial state generated in a dynamical flux-tube model. The general development of thermodynamical extensives are also shown for lower energies. We observe considerable deviations from a thermal equilibrium source as a consequence of the fluid dynamical expansion arising from a least fluctuating initial state.

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D. J. Wang, L. P. Csernai, D. Strottman, Cs. Anderlik, Y. Cheng, D. M. Zhou, Y. L. Yan, X. Cai, B. H. Sa. 2012-09-25. QGP flow fluctuations and the characteristics of higher moments. https://doi.org/10.1140/epja%2Fi2012-12168-4

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