Intermediate Mass Dilepton Production in a Chemically Equilibrating Quark-Gluon Matter

Dilepton production during the chemical equilibration of the quark-gluon matter with the finite baryon density has been studied. We find that due to slowing down of the cooling rate and high initial temperature of the quark-gluon matter produced at RHIC energies, the quark phase contribution to dileptons with intermediate masses is significantly heightened and is much larger than that calculated by the evolution of thermodynamic equilibrium system. The latter has shown an enhancement of intermediate mass dileptons from the quark phase. Therefore, such an enhancement of dileptons should be a signature for the quark-gluon matter formation.