ON A MEAN FIELD APPROXIMATION FOR HIGGS-YUKAWA SYSTEMS
- 10 April 1994
- journal article
- Published by World Scientific Pub Co Pte Ltd in Modern Physics Letters A
- Vol. 9 (11) , 983-991
- https://doi.org/10.1142/s0217732394000824
Abstract
We discuss the phase structure of a lattice Higgs-Yukawa system in the variational mean field approximation with contributions of fermionic determinant being calculated in a ladder approximation. In particular, we demonstrate that in this approximation the ferromagnetic phase in the Z2 model with naive fermions can appear as an artifact of a finite lattice and that the phase diagram for this model on infinite lattice changes qualitatively at space-time dimension D = 4 compared with those at D > 4.Keywords
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