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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 |
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| Cite this article: |
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HE Ze-Jun, ZHOU Wen-Jie, ZHANG Jia-Ju et al 2001 Chin. Phys. Lett. 18 1331-1333 |
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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.
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25.75.Dw
12.38.Mh
24.10.Nz
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Published: 01 October 2001
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