Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-03-16
Phys.Rev. C64 (2001) 044902
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX 16 pages and 7 figures, to appear in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.64.044902
We investigate the problem of quantum back reactions due to particle production by the parametric resonance mechanism in an environment of nonequilibrium chiral phase transition. We work with the linear sigma model and employ Boyanovsky et al.'s formalism to take account of back reactions under the Hartree-Fock approximation. We calculate the single pion momentum distributions and two pion correlations under the initial condition of thermal equilibrium and small amplitude sigma oscillations around a potential minimum. We observe that the resonance peak survives under the back reaction which is remarkable considering the strong coupling of the sigma model.
Hiro-Oka Hideaki
Minakata Hisakazu
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