1994/02/02 by I. J. R. Aitchison, M. Klein-Kreisler · 2 citations
Physics and Astronomy · #Particle physics theoretical and experimental studies #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #cond-mat #hep-lat #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.50.1068
published as Phys.Rev. D50 (1994) 1068-1076 · 17 pages + 13 figures (available upon request), Oxford preprint OUTP-93-30P, IFUNAM preprint FT94-39, LaTex
arxiv created 1994/02/02 · openalex publication_date 1994/07/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A recent study of dynamical chiral symmetry breaking in N flavor three-dimensional QED at finite temperature is extended to include the effect of fermion wave function renormalization in the Schwinger-Dyson equations. The simple ``zero-frequency'' truncation previously used is found to lead to unphysical results, especially as T\ensuremath→0. A modified set of equations is proposed, whose solutions behave in a way which is qualitatively similar to the T=0 solutions of Pennington and co-workers who have made extensive studies of the effect of wave function renormalization in this context, and who concluded that there was no critical Nc (at T=0) above which chiral symmetry was restored. In contrast, we find that our modified equations predict a critical Nc at T\ensuremath≠0, and an N-T phase diagram very similar to the earlier study neglecting wave function renormalization. The reason for the difference is traced to the different infrared behavior of the vacuum polarization at T=0 and at T\ensuremath≠0.