ON A MEAN-FIELD APPROXIMATION FOR HIGGS-YUKAWA SYSTEMS

Authors
ZENKIN SV
Citation
Sv. Zenkin, ON A MEAN-FIELD APPROXIMATION FOR HIGGS-YUKAWA SYSTEMS, Modern physics letters A, 9(11), 1994, pp. 983-991
Citations number
11
Categorie Soggetti
Physics, Nuclear","Physics, Particles & Fields","Physycs, Mathematical
Journal title
Modern physics letters A → ACNP
ISSN journal
02177323
Volume
9
Issue
11
Year of publication
1994
Pages
983 - 991
Database
ISI
SICI code
0217-7323(1994)9:11<983:OAMAFH>2.0.ZU;2-A
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 tho se at D > 4.