Phase transitions in isolated strongly interacting systems
摘要
Thermodynamical properties of the nuclear matter at sub-saturation densities were investigated using a simple van der Waals-like equation of state with an additional term representing the symmetry energy. First-order isospin-asymmetric liquid-gas phase transition appears restricted to isolated isospin-asymmetric systems while the symmetric systems will undergo fragmentation decay resembling the second-order phase transition. The density dependence of the symmetry energy scaling with the Fermi energy satisfactorily describes the symmetry energy at sub-saturation nuclear densities. The deconfinement-confinement phase transition from the quark-gluon plasma to the confined quark matter appears in the isolated systems continuous in energy density while discontinuous in quark density. A transitional state of the confined quark matter has a negative pressure and after hadronization an explosion scenario can take place which can offer explanation for the HBT puzzle as a signature of the phase transition.
引用
@article{arxiv.nucl-th/0703077,
title = {Phase transitions in isolated strongly interacting systems},
author = {M. Veselsky},
journal= {arXiv preprint arXiv:nucl-th/0703077},
year = {2009}
}
备注
18 pages, 8 figures, LaTeX, minor corrections