Relations among correlation functions in the high temperature phase of QCD with broken SU(3)

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 π and δ correlators is found to be of order ms times a U(1)A− violating correlator. These general arguments are consistent with Schaeferʹs observation that if U(1)A violation persists to high enough temperatures then the strange η can be lighter than the non-strange one.