Chemical Equilibration and Dilepton Production of Quark-Gluon Plasma at RHIC Energies
LONG Jia-Li1, HE Ze-Jun1,2, MA Guo-Liang1, MA Yu-Gang1, LIU Bo3
1Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, PO Box 800-204, Shanghai 201800
2CCAST (World Laboratory), PO Box 8730, Beijing 100080
3Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039
Chemical Equilibration and Dilepton Production of Quark-Gluon Plasma at RHIC Energies
LONG Jia-Li1;HE Ze-Jun1,2;MA Guo-Liang1;MA Yu-Gang1;LIU Bo3
1Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, PO Box 800-204, Shanghai 201800
2CCAST (World Laboratory), PO Box 8730, Beijing 100080
3Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039
Abstract： An evolution model of the chemically equilibrating quark-gluon plasma system has been established based on the Jüttner distribution function of partons. By studying the dilepton production of the system, we find that due to high initial temperature, a dominant contribution to dileptons with intermediate masses is provided by gluon density of the system as well as large gluon fusion gg → cc cross section in the intermediate mass region, quark--antiquark annihilation qq → ll and, especially, thermal charmed quarks from the gluon fusion gg → cc and quark--antiquark annihilation qq → cc.
(Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions))
LONG Jia-Li;HE Ze-Jun;MA Guo-Liang;MA Yu-Gang;LIU Bo. Chemical Equilibration and Dilepton Production of Quark-Gluon Plasma at RHIC Energies[J]. 中国物理快报, 2004, 21(1): 47-50.
LONG Jia-Li, HE Ze-Jun, MA Guo-Liang, MA Yu-Gang, LIU Bo. Chemical Equilibration and Dilepton Production of Quark-Gluon Plasma at RHIC Energies. Chin. Phys. Lett., 2004, 21(1): 47-50.
2004, Vol. 21 
