Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
; Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
; Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
The evolution and dilepton production of a chemically equilibrating quark-gluon plasma system at finite baryon density have been studied. It was found that due to the increase of the quark phase life-time with increasing initial quark chemical potential, and other factors like higher initial temperature, larger gluon density and gluon fusion or quark annihilation cross section, thermal charmed quarks provide a dominant contribution to dilepton yield. This results in a significant enhancement of intermediate mass dilepton production.