Dileptons from a Chemically Equilibrating Quark--Gluon Plasma at Finite Baryon Density
GUAN Na-Na1,2, HE Ze-Jun1, LONG Jia-Li1, CAI Xiang-Zhou1
1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 2018002Graduate School of the Chinese Academy of Sciences, Beijing 100049
Dileptons from a Chemically Equilibrating Quark--Gluon Plasma at Finite Baryon Density
GUAN Na-Na1,2, HE Ze-Jun1, LONG Jia-Li1, CAI Xiang-Zhou1
1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 2018002Graduate School of the Chinese Academy of Sciences, Beijing 100049
We perform a complete calculation for the dilepton production from the processes qq-→ll-, Compton-like (qg→qll-, q-g→q-ll-),qq-→gll-, gluon fusion gg-→cc-, annihilation qq-→cc- as well as multiple scattering of quarks in a chemically equilibrating quark--gluon plasma system at finite baryon density. It is found that quark-antiquark annihilation, Compton-like, gluon fusion and multiple scattering of quarks give important contribution. Moreover, the increase of the quark phase life-time with increasing initial quark chemical potential makes the dilepton yield as an increasing function of the initial quark chemical potential.
We perform a complete calculation for the dilepton production from the processes qq-→ll-, Compton-like (qg→qll-, q-g→q-ll-),qq-→gll-, gluon fusion gg-→cc-, annihilation qq-→cc- as well as multiple scattering of quarks in a chemically equilibrating quark--gluon plasma system at finite baryon density. It is found that quark-antiquark annihilation, Compton-like, gluon fusion and multiple scattering of quarks give important contribution. Moreover, the increase of the quark phase life-time with increasing initial quark chemical potential makes the dilepton yield as an increasing function of the initial quark chemical potential.
(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))
GUAN Na-Na;HE Ze-Jun;LONG Jia-Li;CAI Xiang-Zhou. Dileptons from a Chemically Equilibrating Quark--Gluon Plasma at Finite Baryon Density[J]. 中国物理快报, 2008, 25(11): 3916-3919.
GUAN Na-Na, HE Ze-Jun, LONG Jia-Li, CAI Xiang-Zhou. Dileptons from a Chemically Equilibrating Quark--Gluon Plasma at Finite Baryon Density. Chin. Phys. Lett., 2008, 25(11): 3916-3919.
2008, Vol. 25 
