Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-11-03
Acta Phys.Polon.B28:2873-2895,1997
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages LaTeX, 11 figures using epsfig. To be published in the proceedings of the XXXVII-th Cracow School of Theoretical Phys
Scientific paper
The electromagnetic emissivity from QCD media away from equilibrium is studied in the framework of closed time path thermal field theory. For the dilepton rate a nonequilibrium mesonic medium is considered applying finite temperature perturbation theory for $\pi -\rho$ interactions. The dilepton rate is derived up to the order $g_\rho^2$. For hard photon production a quark gluon plasma is assumed and calculations are performed in leading order in the strong coupling constant. These examples are chosen in order to investigate the role of possible pinch terms in boson and in fermion propagators, respectively. The implications of the results for phenomenology are also discussed.
Baier Ricardo Ruiz
Dirks M.
Redlich Krzysztof
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