Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-12-20
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 Pages, presented at Workshop on Light-Cone QCD and Nonperturbative Hadron Physics 2005 (LC2005), Cairns, July 2005, to appe
Scientific paper
10.1016/j.nuclphysbps.2006.08.04
We discuss how the dynamics of the evolving hot fireball of quark--gluon matter impacts phase transition between the deconfined and confined state of matter. The rapid expansion of the fireball of deconfined matter created in heavy ion collisions facilitates formation of an over-saturated strange quark phase space. The related excess abundance of strangeness is compensating the suppression of this semi-heavy quark yield by its quark mass. In addition, the dynamical expansion of colored quanta pushes against the vacuum structure, with a resulting supercooling of the transition temperature. We address the status of the search for the phase boundary as function of reaction energy and collision centrality and show evidence for a change in reaction mechanism at sufficiently low energies. The phase diagram derived from the study of hadron production conditions shows two boundaries, one corresponding to the expected transition between confined and deconfined matter, with a downward temperature shift, and the other a high quark density hadronization which appears to involve heavy effective quarks, at relatively large temperatures.
Letessier Jean
Rafelski Johann
No associations
LandOfFree
Strangeness and thresholds of phase changes in relativistic heavy ion collisions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Strangeness and thresholds of phase changes in relativistic heavy ion collisions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strangeness and thresholds of phase changes in relativistic heavy ion collisions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-422084