Quark-Gluon Plasma in the Early Universe

Details Quark-Gluon Plasma in the Early Universe Quark-Gluon Plasma in the Early Universe

2001-01-29

arxiv.org/abs/astro-ph/0101516v1

Astronomy and Astrophysics

Astrophysics

19 pages, 9 figures. To appear in the proceedings of the International School of Astrophysics D. Chalonge, 8th Course, "Phase

Scientific paper

A QCD phase transition in the early universe could have left inhomogeneities in the baryon to photon ratio and in isospin that might have affected nucleosynthesis later on. At very high temperature QCD plasma can be described by perturbation theory because of asymptotic freedom, but a possible phase transition requires a nonperturbative approach like lattice gauge theory. Assuming that a first order transition did occur, a dynamical set of equations can be solved to evolve the universe through it and to quantify the scale of inhomogeneity. Unfortunately this scale appears to be too small by two orders of magnitude to affect nucleosynthesis.

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