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Titolo:
Nonequilibrium chiral perturbation theory and pion decay functions
Autore:
Nicola, AG; Galan-Gonzalez, V;
Indirizzi:
Univ Complutense, Dept Fis Teor, E-28040 Madrid, Spain Univ Complutense Madrid Spain E-28040 pt Fis Teor, E-28040 Madrid, Spain UnivEngland Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ,Univ London Imperial Coll Sci Technol & Med London England SW7 2BZ 2BZ,
Titolo Testata:
PHYSICS LETTERS B
fascicolo: 3-4, volume: 449, anno: 1999,
pagine: 288 - 298
SICI:
0370-2693(19990311)449:3-4<288:NCPTAP>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
QCD PHASE-TRANSITION; FINITE-TEMPERATURE; EQUILIBRIUM; EVOLUTION; ENERGY; FIELD;
Keywords:
nonequilibrium thermal field theory; chiral perturbation theory; pion decay constants; heavy-ion collisions; quantum field theory in curved space-time;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Nicola, AG Univ Complutense, Dept Fis Teor, E-28040 Madrid, Spain Univ Complutense Madrid Spain E-28040 , E-28040 Madrid, Spain
Citazione:
A.G. Nicola e V. Galan-Gonzalez, "Nonequilibrium chiral perturbation theory and pion decay functions", PHYS LETT B, 449(3-4), 1999, pp. 288-298

Abstract

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. (C) 1999 Elsevier Science B.V. All rights reserved.

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Documento generato il 21/09/20 alle ore 05:21:21