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The High Temperature Phase of QCD and U(1)A Symmetry

Thomas. D. Cohen

hep-pharXiv:hep-ph/9601216

Abstract

Inequalities for QCD functional integrals are used to establish that up to certain technical assumptions. the high temperature chirally restored phase of QCD is effectively symmetric under U(Nf) × U(Nf) rather than SU(Nf) × SU(Nf). If these assumptions are correct, there are no effects due to anomalous breaking of U(1)A on correlation functions in this phase.

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