UA(1) symmetry restoration in QCD withNfflavors

Recently, there have been reports that the chirally restored phase of QCD is effectively symmetric under U(${\mathit{N}}_{\mathit{f}}$)× U(${\mathit{N}}_{\mathit{f}}$) rather than SU(${\mathit{N}}_{\mathit{f}}$)×SU(${\mathit{N}}_{\mathit{f}}$). 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 ${\mathit{N}}_{\mathit{f}}$ flavors in the high-temperature chirally restored phase. © 1996 The American Physical Society.