Recent results on screening masses

Recent results for screening masses at high temperature are presented. The spatial correlation functions of operators with meson quantum numbers were obtained on quenched gauge configurations with non-perturbatively improved Wilson quarks as well as, in a different round of analysis, on the NF = 2+1 configurations generated in the course of RBC-Bielefeld’s analysis of the Equation of State. While vector and axial vector channels signal the restoration of chiral symmetry in both cases, in 2 + 1 flavor QCD pseudoscalar and isovector scalar become degenerate only at a temperature higher than the chiral crossover one, thus indicating that the UA(1) is effectively restored only at higher temperatures. In the investigated temperature range pseudoscalar and vector screening masses do not become equal, contrary to the free case and to leading order perturbation theory. For the quenched Wilson case the differences could be established in the infinite volume continuumm limit.