Abstract

The current algebra Gell-Mann, Oakes, and Renner (GMOR) relation in SU(2) ? SU(2) and at non-zero temperature, is investigated in the framework of QCD sum rules. We find no corrections at leading order in the quark masses. At the next to leading order we find corrections of the form m2 q T2, which are small except near the critical temperature. As a byproduct, the temperature dependence of the pion mass is obtained, which turns out to be a constant (independent of T), except very near the critical temperature where it increases with T.