We explore the extension of chiral petu rbation theory to a meson gas out of thermal equilibrium. For that purpose, we let the pion decay constant be a time-dependent function and work within the Schwinger-keldysh contour technique. A useful connection with curved space-time QFT is established, which allows to consistently renormalise the model.We discuss the applicability of our approach within a heavy-ion collision environment.
展开▼
