Intermediate Mass Dilepton Production in a Chemically Equilibrating Quark-Gluon Matter
HE Ze-Jun1,2, ZHOU Wen-Jie2, ZHANG Jia-Ju2, LIU Bo3
1Center of Theoretical Nuclear Physics, National
Laboratory of Heavy Ion Accelerator, Lanzhou 730000
2Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800
3Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039
Intermediate Mass Dilepton Production in a Chemically Equilibrating Quark-Gluon Matter
HE Ze-Jun1,2;ZHOU Wen-Jie2;ZHANG Jia-Ju2;LIU Bo3
1Center of Theoretical Nuclear Physics, National
Laboratory of Heavy Ion Accelerator, Lanzhou 730000
2Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800
3Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039
Abstract： 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.
HE Ze-Jun;ZHOU Wen-Jie;ZHANG Jia-Ju;LIU Bo. Intermediate Mass Dilepton Production in a Chemically Equilibrating Quark-Gluon Matter[J]. 中国物理快报, 2001, 18(10): 1331-1333.
HE Ze-Jun, ZHOU Wen-Jie, ZHANG Jia-Ju, LIU Bo. Intermediate Mass Dilepton Production in a Chemically Equilibrating Quark-Gluon Matter. Chin. Phys. Lett., 2001, 18(10): 1331-1333.
2001, Vol. 18 
