2026-06-27T06:05:27Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/609272023-09-07T19:14:48Zcom_20.500.14352_14col_20.500.14352_21

Gómez Nicola, Ángel 2023-06-20T21:11:29Z 2023-06-20T21:11:29Z 1999-03-11 1-56396-927-0 10.1063/1.1303025 https://hdl.handle.net/20.500.14352/60927 http://dx.doi.org/10.1063/1.1303025 http://scitation.aip.org http://arxiv.org/abs/hep-ph/9910533 We analyse the extension of Chiral Perturbation Theory to describe a meson gas out of thermal equilibrium. For that purpose, se 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 renormalise 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. eng open access Nonequilibrium chiral perturbation theory and disoriented chiral condensates book part