Dileptons from a Chemically Non-equilibrated Quark-Gluon Plasma

LONG Jia-Li; HE Ze-Jun; JIANG Wei-Zhou; MA Yu-Gang; LIU Bo

Chinese Physics C> 2004, Vol. 28> Issue(4) : 387-391

Dileptons from a Chemically Non-equilibrated Quark-Gluon Plasma

Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,China3 Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100039,China

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Abstract：
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.

References

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LONG Jia-Li, HE Ze-Jun, JIANG Wei-Zhou, MA Yu-Gang and LIU Bo. Dileptons from a Chemically Non-equilibrated Quark-Gluon Plasma[J]. Chinese Physics C, 2004, 28(4): 387-391.

LONG Jia-Li, HE Ze-Jun, JIANG Wei-Zhou, MA Yu-Gang and LIU Bo. Dileptons from a Chemically Non-equilibrated Quark-Gluon Plasma[J]. Chinese Physics C, 2004, 28(4): 387-391. shu

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Received: 2003-06-12
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Dileptons from a Chemically Non-equilibrated Quark-Gluon Plasma

Corresponding author: HE Ze-Jun,

Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,China3 Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100039,China

Received Date: 2003-06-12
Accepted Date: 1900-01-01
Available Online: 2004-04-05

Abstract: 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.