Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-10-02
Phys.Rev. D54 (1996) 6072-6082
Physics
High Energy Physics
High Energy Physics - Phenomenology
33 pages, Latex file, 6 postscript figures included in the text (psfig.tex). To appear in Phys. Rev. D15
Scientific paper
10.1103/PhysRevD.54.6072
One of the most interesting questions regarding a possible first order cosmological quark--hadron phase transition concerns the final fate of the baryon number contained within the disconnected quark regions at the end of the transition. We here present a detailed investigation of the hydrodynamical evolution of an evaporating quark drop, using a multi-component fluid description to follow the mechanisms of baryon number segregation. With this approach, we are able to take account of the simultaneous effects of baryon number flux suppression at the phase interface, entropy extraction by means of particles having long mean-free-paths, and baryon number diffusion. A range of computations has been performed to investigate the permitted parameter-space and this has shown that significant baryon number concentrations, perhaps even up to densities above that of nuclear matter, represent an inevitable outcome within this scenario.
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