L. Rezzolla, BARYON NUMBER SEGREGATION AT THE END OF THE COSMOLOGICAL QUARK-HADRONTRANSITION, Physical review. D. Particles and fields, 54(10), 1996, pp. 6072-6082
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 quack drop, using a mu
lticomponent fluid description to follow the mechanisms of baryon numb
er segregation. With this approach, we are able to take account of the
simultaneous effects of baryon number flux suppression at the phase i
nterface, entropy extraction by means of particles having long mean fr
ee paths, and baryon number diffusion. A range of computations has bee
n performed to investigate the permitted parameter space and this has
shown that significant baryon number concentrations, perhaps even up t
o densities above that of nuclear matter, represent an inevitable outc
ome within this scenario.