Nonequilibrium chiral perturbation theory and disoriented chiral condensates

Nicola, Angel Go´mez
March 2000
AIP Conference Proceedings;2000, Vol. 508 Issue 1, p204
Academic Journal
We analyze the extension of Chiral Perturbation Theory to describe 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 allows to consistently renormalize the model, introducing two new low-energy constants in the chiral limit. We discuss the applicability of our approach within a Relativistic Heavy-Ion Collision environment. In particular, we investigate the formation of Disoriented Chiral Condensate domains in this model, via the parametric resonance mechanism. © 2000 American Institute of Physics.


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