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...
| Authors: | ; |
|---|---|
| Format: | Article |
| Publication date: | 1999 |
| Country: | España |
| Institution: | Universidad Complutense de Madrid (UCM) |
| Repository: | Docta Complutense |
| Language: | English |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/59584 |
| Online Access: | https://hdl.handle.net/20.500.14352/59584 |
| Access Level: | Open access |
| Keyword: | 51-73 Qcd phase-Transition Finite-temperature Equilibrium Evolution Energy Field Física-Modelos matemáticos Física matemática |
| _version_ | 1878732268100386816 |
|---|---|
| author | Gómez Nicola, Ángel |
| author2 | Galán González, V. |
| author2_role | author |
| author_browse | Galán González, V. Gómez Nicola, Ángel |
| author_facet | Gómez Nicola, Ángel Galán González, V. |
| author_role | author |
| collection | Docta Complutense |
| description | 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. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_3fb9e5ee86b3d4e68f362ff41a3ded31 |
| institution | Universidad Complutense de Madrid (UCM) |
| instname_str | Universidad Complutense de Madrid (UCM) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:docta.ucm.es:20.500.14352/59584 |
| publishDate | 1999 |
| publishDateSort | 1999 |
| publisher | Elsevier science |
| publisherStr | Elsevier science |
| reponame_str | Docta Complutense |
| spelling | Nonequilibrium chiral perturbation theory and pion decay functions Gómez Nicola, Ángel Galán González, V. 51-73 Qcd phase-Transition Finite-temperature Equilibrium Evolution Energy Field Física-Modelos matemáticos Física matemática 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. Elsevier science https://hdl.handle.net/20.500.14352/59584 |
| spellingShingle | Nonequilibrium chiral perturbation theory and pion decay functions Gómez Nicola, Ángel 51-73 Qcd phase-Transition Finite-temperature Equilibrium Evolution Energy Field Física-Modelos matemáticos Física matemática |
| title | Nonequilibrium chiral perturbation theory and pion decay functions |
| title_full | Nonequilibrium chiral perturbation theory and pion decay functions |
| title_fullStr | Nonequilibrium chiral perturbation theory and pion decay functions |
| title_full_unstemmed | Nonequilibrium chiral perturbation theory and pion decay functions |
| title_short | Nonequilibrium chiral perturbation theory and pion decay functions |
| title_sort | Nonequilibrium chiral perturbation theory and pion decay functions |
| topic | 51-73 Qcd phase-Transition Finite-temperature Equilibrium Evolution Energy Field Física-Modelos matemáticos Física matemática |
| topic_facet | 51-73 Qcd phase-Transition Finite-temperature Equilibrium Evolution Energy Field Física-Modelos matemáticos Física matemática |
| url | https://hdl.handle.net/20.500.14352/59584 |