Chinese Acad Sci, Inst Modern Phys, Res Ctr Nucl Theory, Natl Lab Heavy Ion Accelerator, Lanzhou 730000, Peoples R China
; Chinese Acad Sci, Shanghai Inst Nucl Res, Shanghai 201800, Peoples R China
; Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
We have studied dilepton production in a chemically equilibrating quark-gluon matter produced at RHIC energies. We End that the dilepton yield is no longer a monotonically decreasing function of the initial quark chemical potential. Therefore, the dilepton suppression may not be useful as a signature for quark-gluon matter formation.