1992/07/20 by I. J. R. Aitchison, I.J.R. Aitchison, N. Dorey +3 · 3 citations
Physics and Astronomy · #Chiral symmetry #Cold Atom Physics and Bose-Einstein Condensates #Fermion #High-Energy Particle Collisions Research #Mass generation #Phase (matter) #Phase diagram #Quantum Chromodynamics and Particle Interactions #Symmetry (geometry) #Symmetry breaking #Work (physics) #hep-ph #hep-th
paper · pdf · doi:10.1016/0370-2693(92)91645-p
published as Phys.Lett. B294 (1992) 91-99 · 9 pages
arxiv created 1992/07/20 · openalex publication_date 1992/11/01 · arxiv updated 2016/09/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Dynamical symmetry breaking in three-dimensional QED with N fermion flavours is considered at finite temperature, in the large N approximation. Using an approximate treatment of the Schwinger-Dyson equation for the fermion self-energy, we find that chiral symmetry is restored above a certain critical temperature which depends itself on N. We find that the ratio of the zero-momentum zero-temperature fermion mass to the critical temperature has a large value compared with four-fermion theories, as had been suggested in a previous work with a momentum-independent self-energy. Evidence of a temperature- dependent critical N is shown to appear in this approximation. The phase diagram for spontaneous mass generation in the theory is presented in T-N space.