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, changing skewness and kurtosis by time depending on beam energy as a consequence of the fluid dynamical expansion arising from a least fluctuating initial state.
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Wang, D.J., Csernai, L.P., Strottman, D. et al. QGP flow fluctuations and the characteristics of higher moments. Eur. Phys. J. A 48, 168 (2012). https://doi.org/10.1140/epja/i2012-12168-4
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DOI: https://doi.org/10.1140/epja/i2012-12168-4