Nonequilibrium chiral perturbation theory and pion decay functions
We extend chiral perturbation theory to study a meson gas out of thermal equilibrium. Assuming that the system is initially in equilibrium at T-i < T-c and working within the Schwinger-Keldysh contour technique, we define consistently the time-dependent temporal and spatial pion decay functions, the...
| Autores: | ; |
|---|---|
| Tipo de documento: | Artigo |
| Data de publicação: | 1999 |
| País: | España |
| Recursos: | Universidad Complutense de Madrid (UCM) |
| Repositório: | Docta Complutense |
| Idioma: | Inglês |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/59584 |
| Acesso em linha: | https://hdl.handle.net/20.500.14352/59584 |
| Nível de acesso: | Acesso aberto |
| Palavra-chave: | 51-73 Qcd phase-Transition Finite-temperature Equilibrium Evolution Energy Field Física-Modelos matemáticos Física matemática |
| Resumo: | We extend chiral perturbation theory to study a meson gas out of thermal equilibrium. Assuming that the system is initially in equilibrium at T-i < T-c and working within the Schwinger-Keldysh contour technique, we define consistently the time-dependent temporal and spatial pion decay functions, the counterparts of the pion decay constants, and calculate them to next to leading order. The link with curved space-time QFT allows to establish nonequilibrium renormalisation. The short-time behaviour and the applicability of our model to a heavy-ion collision plasma are also discussed in this work. |
|---|