Speaker: Dam Thanh Son (INT, Seattle)

Pion propagation at finite temperature

We point out that all parameters describing the real-time propagation of soft pions at temperatures below the QCD chiral phase transition can be expressed in terms of static correlators. This allows, in principle, the determination of the soft pion dispersion relation on the lattice. The precise meaning of the Gell-Mann--Oakes--Renner relation at finite temperature can be given. We predict that when the critical temperature is approached from below, the pole mass of the pion drops despite the growth of the pion screening mass.