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Nonequilibrium chiral perturbation theory and disoriented chiral condensates



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Gómez Nicola, Ángel (1999) Nonequilibrium chiral perturbation theory and disoriented chiral condensates. In Hadron physics: effective theories of low energy qcd. AIP Conference Proceedings (508). Amer Inst Physics. ISBN 1-56396-927-0

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Official URL: http://dx.doi.org/10.1063/1.1303025


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.

Item Type:Book Section
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© Amer Inst Physics.
I wish to thank the organisers of the “Hadron Physics” conference and the Theory group in Coimbra for their kind help and hospitality. Financial support from CICYT, Spain, project AEN97-1693, is also acknowledged.

Uncontrolled Keywords:Phase-transition; High-energy; Finite-temperature; Collisions; Evolution; Mass
Subjects:Sciences > Physics > Physics-Mathematical models
Sciences > Physics > Mathematical physics
ID Code:30638
Deposited On:05 Jun 2015 09:15
Last Modified:10 Dec 2018 15:10

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