Dilepton emission rates from hot hadronic matter

Abstract

The vacuum polarisation effects from the nucleon sector lead to large medium modifications of the vector meson masses in the Walecka model. With a quantum hadrodynamic framework including the quantum effects, and using a quasiparticle description for quark gluon plasma(QGP), the dilepton emission rate from the hot and dense matter resulting from relativistic nuclear collisions is calculated. Using a model for the fireball evolution which has been shown to reproduce other observables such as charmonium suppression, photon emission and the abundance of hadronic species, we compare with the dilepton invariant mass spectrum measured by the CERES collaboration at CERN SPS. We also compare the results to a previous calculation where the spectral function of a virtual photon (a key ingredient for the emission rate) has been calculated in a chiral SU(3) model.

24 pages including 7 figures

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Cited by in corpus (8)

• From Kadanoff-Baym dynamics to off-shell parton transport
• In-medium vector meson masses in a Chiral SU(3) model
• The spectral function of the omega meson in nuclear matter from a coupled-channel resonance model
• Non-perturbative finite $T$ broadening of the $\rho$ meson and dilepton emission in heavy ion-collisions
• A comprehensive description of multiple observables in heavy-ion collisions at SPS
• Finite temperature pion vector form factors in Chiral Perturbation Theory
• What does the rho-meson do? In-medium mass shift scenarios versus hadronic model calculations
• A global description of heavy-ion collisions