https://doi.org/10.1140/epja/i2012-12168-4
Regular Article - Theoretical Physics
QGP flow fluctuations and the characteristics of higher moments
1
Department of Physics and Technology, University of Bergen, 5007, Bergen, Norway
2
Institute of Particle Physics, Huazhong Normal University, 430079, Wuhan, China
3
Uni Computing, Thormøhlensgate 55, N-5008, Bergen, Norway
4
China Institute of Atomic Energy, P.O. Box 275 (10), 102413, Beijing, China
Received:
12
March
2012
Accepted:
21
September
2012
Published online:
28
November
2012
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 
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.
© SIF, Springer-Verlag Berlin Heidelberg, 2012
