Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-12-30
Phys.Rev.D73:103514,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 2 figures, revtex4, more detailed discussion added about formation and evolution of Z(3)domain walls in the universe
Scientific paper
10.1103/PhysRevD.73.103514
We discuss the possibility of generation of baryon inhomogeneities in a quark-gluon plasma phase due to moving Z(3) interfaces. By modeling the dependence of effective mass of the quarks on the Polyakov loop order parameter, we study the reflection of quarks from collapsing Z(3) interfaces and estimate resulting baryon inhomogeneities in the context of the early universe. We argue that in the context of certain low energy scale inflationary models, it is possible that large Z(3) walls arise at the end of the reheating stage. Collapse of such walls could lead to baryon inhomogeneities which may be separated by large distances near the QCD scale. Importantly, the generation of these inhomogeneities is insensitive to the order, or even the existence, of the quark-hadron phase transition. We also briefly discuss the possibility of formation of quark nuggets in this model, as well as baryon inhomogeneity generation in relativistic heavy-ion collisions.
Layek Biswanath
Mishra Ananta P.
Srivastava Ajit M.
Tiwari Vivek K.
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