Topological charge and U(1)A symmetry in the high temperature phase of QCD

1996/01/29 by N. Evans, Nick Evans, Stephen D. H. Hsu +3 · 4 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph

paper · pdf · doi:10.1016/0370-2693(96)00280-8

published as Phys.Lett. B375 (1996) 262-266 · 8 pages, LaTeX

arxiv created 1996/01/29 · openalex publication_date 1996/05/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We discuss the global symmetries of the high temperature phase of QCD with N_f massless quarks. We show that the U(N_f) × U(N_f) symmetries are only violated by operators of dimension ≥ 3 N_f. For N_f > 2 this implies that the thermal two-point correlation functions of the η' and π^a's are identical. We discuss the implications of this for the chiral phase transition at finite temperature.

Citations

• Path integral for gauge theories with fermions

Cited by

• Symmetry and correlation functions in the high temperature phase of QCD
• The axial anomaly in QCD at finite temperature
• U (1) axial symmetry and Dirac spectra in QCD at high temperature
• Meson screening masses in (2+1)-flavor QCD