Nonequilibrium quasi-classical effective meson gas: Thermalization
Departamento de Fısica Teórica I, Facultad de Ciencias Fısicas, Universidad Complutense, 28040, Madrid, Spain
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Accepted: 25 December 2006
Published online: 20 March 2007
We consider a gas of interacting relativistic effective mesons (qualitatively, like those produced in a heavy-ion collision), regarded as an out-of-equilibrium statistical system. We suppose large occupation numbers, temperature somewhat below typical critical temperatures and the quasi-classical regime. At some initial time t0, let the gas be in a nonequilibrium state, with spatial inhomogeneities. The time evolution of the gas for t > t 0 is studied by a moment method, and appropriate long-time approximations, which could yield the approach to global thermal equilibrium, are discussed.
PACS: 11.10.Wx Finite-temperature field theory – / 11.25.Db Properties of perturbation theory – / 11.10.Gh Renormalization – / 11.90.+t Other topics in general theory of fields and particles –
© Società Italiana di Fisica and Springer-Verlag, 2007