Non-equilibrium approaches to the pre-thermal and post-hadronisation stages of A+A collisions - INSPIRE

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Non-equilibrium approaches to the pre-thermal and post-hadronisation stages of A+A collisions

Yu.M. Sinyukov
(
- BITP, Kiev
)
,
Iu.A. Karpenko
(
- BITP, Kiev
)

Nov, 2009

10 pages

Part of Proceedings, 39th International Symposium on Multiparticle Dynamics (ISMD 2009) : Gomel, Belarus, September 4-9, 2009

Published in:

Nonlin.Phenom.Complex Syst. 12 (2009) 496-502

Contribution to:

e-Print:

0911.4439 [nucl-th]

View in:

ADS Abstract Service

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Abstract: (arXiv)

The results related to non-equilibrium phenomena at the very early and late stages of the processes of A+A collisions are presented. A good description of the hadron momentum spectra as well as pion and kaon interferometry data at RHIC is reached within the realistic dynamical picture of A+A collisions: HydroKinetic Model (HKM). The model accumulates the following features: not too early thermalization time;

\tau\geq 1

fm/c; a developing of the pre-thermal transverse flows; the effectively more hard, than in the case of chemical equilibrium, equation of state of expanding chemically non-equilibrated multi-hadronic gas; a continuous non-equilibrated emission of hadrons. All these factors lead to a good description of the mentioned RHIC data, in particular, the observed

R_{out}/R_{side}

ratios, solving, therefore, the HBT puzzle in detailed realistic model.

Note:

10 pages, 2 figures; talks given at XXXIX International Symposium on Multiparticle Dynamics, Gomel, Belarus September 4-9, 2009 and ECT Workshop on flows and dissipation in ultrarelativistic A+A collisions September 14-18, 2009

24.10.Nz
25.75.-q
heavy ion collisions
momentum spectra
HBT radii
hydrodynamics
kinetics
hadron: momentum spectrum
flow: transverse
hadron: emission

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