Relations Among Correlation Functions in the High Temperature Phase of QCD with Broken SU(3)

Abstract

Group-theoretic arguments are used to determine the dependence of two-point correlators of quark bilinears on the current quark masses. The leading difference between $\pi$ and $\delta$ correlators is found to be of order $m_s$ times a U(1)${}_A$-violating correlator. These general arguments are consistent with Schaefer's observation that if U(1)${}_A$ violation persists to high enough temperatures then the strange $\eta$ can be lighter than the non-strange one.

8 pages

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