Mc. Birse et al., RELATIONS AMONG CORRELATION-FUNCTIONS IN THE HIGH-TEMPERATURE PHASE OF QCD WITH BROKEN SU(3), Physics letters. Section B, 399(3-4), 1997, pp. 263-266
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 argume
nts are consistent with Schaefer's observation that if U(1)A violation
persists to high enough temperatures then the strange eta can be ligh
ter than the non-strange one. (C) 1997 Elsevier Science B.V.