UA(1) symmetry restoration in QCD with Nf flavors
Su H. Lee, T. Hatsuda
Abstract
Recently, there have been reports that the chirally restored phase of QCD is effectively symmetric under U(Nf) × U(Nf) rather than SU(Nf)× SU(Nf). We supplement their argument by including the contributions from topologically nontrivial gauge field configurations and discuss how the conclusions are modified. General statements are made concerning the particle spectrum of QCD with light Nf flavors in the high temperature chirally restored phase.
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