摘要
We perform a complete calculation for the dilepton production from the processes qq→ll Compton-like （qg-＋qll, qg→qU, 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, qg→qU, 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.
基金
Supported in part by THE Knowledge Innovation Project of Chinese Academy of Science under Grant No KJCX2-N11, the National Natural Science Foundation of China under Grant Nos 10075071, 10275002, 10328509, 10135030 and 10875159, the Major State Basic Research Programme of China under Contract No G200077400.
