Dilepton production from hot hadronic matter in nonequilibrium

Details Dilepton production from hot hadronic matter in nonequilibrium Dilepton production from hot hadronic matter in nonequilibrium

2005-09-03

arxiv.org/abs/hep-ph/0509026v2

Phys.Rev.C73:034909,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages, 20 figures, accepted version for publication in Phys.Rev.C

Scientific paper

10.1103/PhysRevC.73.034909

The influence of time dependent medium modifications of low mass vector mesons on dilepton yields is investigated within a nonequilibrium quantum field theoretical description on the basis of the Kadanoff-Baym equations. Time scales for the adaption of the spectral properties to changing self energies are given and, under use of a model for the fireball evolution, nonequilibrium dilepton yields from the decay of rho- and omega-mesons are calculated. In a comparison of these yields with those from calculations that assume instantaneous (Markovian) adaption to the changing medium, quantum mechanical memory effects turn out to be important.

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