Finite temperature Z(N) phase transition with Kaluza-Klein gauge fields

Details Finite temperature Z(N) phase transition with Kaluza-Klein gauge fields Finite temperature Z(N) phase transition with Kaluza-Klein gauge fields

2002-07-29

arxiv.org/abs/hep-ph/0207343v2

Nucl.Phys. B655 (2003) 170-184

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages. Revised version, to appear in Nucl.Phys.B

Scientific paper

10.1016/S0550-3213(03)00067-1

If SU(N) gauge fields live in a world with a circular extra dimension, coupling there only to adjointly charged matter, the system possesses a global Z(N) symmetry. If the radius is small enough such that dimensional reduction takes place, this symmetry is spontaneously broken. It turns out that its fate at high temperatures is not easily decided with straightforward perturbation theory. Utilising non-perturbative lattice simulations, we demonstrate here that the symmetry does get restored at a certain temperature T_c, both for a 3+1 and a 4+1 dimensional world (the latter with a finite cutoff). To avoid a cosmological domain wall problem, such models would thus be allowed only if the reheating temperature after inflation is below T_c. We also comment on the robustness of this phenomenon with respect to small modifications of the model.

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