Which Chiral Symmetry is Restored in High Temperature QCD?
High Energy Physics - Lattice
2008-11-26 v1
Abstract
Sigma models for the high temperature phase transition in quantum chromodynamics (QCD) suggest that at high temperature the SU(N_f) x SU(N_f) chiral symmetry becomes exact, but the anomalous axial U(1) symmetry need not be restored. In numerical lattice simulations, traditional methods for detecting symmetry restoration have sought multiplets in the screening mass spectrum. However, these methods were imprecise and the results, so far, incomplete. With improved statistics and methodology, we are now able to offer evidence for a restoration of the SU(2) x SU(2) chiral symmetry just above the crossover, but not of the axial U(1) chiral symmetry.
Keywords
Cite
@article{arxiv.hep-lat/9611031,
title = {Which Chiral Symmetry is Restored in High Temperature QCD?},
author = {Claude Bernard and Tom Blum and Carleton DeTar and Steven Gottlieb and Urs M. Heller and James E. Hetrick and K. Rummukainen and R. Sugar and D. Toussaint and Matthew Wingate},
journal= {arXiv preprint arXiv:hep-lat/9611031},
year = {2008}
}
Comments
LaTeX 4 pp plus 2 encapsulated Postscript figures