Observable Consequences of Crossover-type Deconfinement Phase Transition
Abstract
Equation of State (EoS) for hot and dense nuclear matter with a quark-hadron phase transition is constructed within a statistical mixed-phase model assuming coexistence of unbound quarks in nuclear surrounding. This model predicts the deconfinement phase transition of the crossover type. The so-called "softest point" effect of EoS is analyzed and confronted to that for other equations of state which exhibit the first order phase transition (two-phase bag model) or no transition at all (hadron resonance gas). It is demonstrated that the beam energy dependence of the directed flow is a smooth function in the whole range from SIS till SPS energies and allows to disentangle different EoS, being in good agreement with experimental data for the statistical mixed-phase model. In contrast, excitation functions for relative strangeness abundance turn out to be insensitive to the order of phase transition.
Cite
@article{arxiv.nucl-th/0210039,
title = {Observable Consequences of Crossover-type Deconfinement Phase Transition},
author = {V. D. Toneev},
journal= {arXiv preprint arXiv:nucl-th/0210039},
year = {2007}
}
Comments
9 pages, 4 figures, talk at the XVI International Baldin Seminar on High Energy Physics Problems, Dubna, June 10-15, 2002