Photons from Quark and Hadron Phases in Au + Au Collisions
LONG Jia-Li1, HE Ze-Jun1,2,3, MA Yu-Gang1,2, GUAN Na-Na1
1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, PO Box 800-204, Shanghai 2018002CCAST (World Laboratory), PO Box 8730, Beijing 1000803Research Center of Nuclear Theory of National Laboratory of Heavy Ion Accelerator, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000
Photons from Quark and Hadron Phases in Au + Au Collisions
LONG Jia-Li1, HE Ze-Jun1,2,3, MA Yu-Gang1,2, GUAN Na-Na1
1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, PO Box 800-204, Shanghai 2018002CCAST (World Laboratory), PO Box 8730, Beijing 1000803Research Center of Nuclear Theory of National Laboratory of Heavy Ion Accelerator, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000
摘要Based on a relativistic hydrodynamic model describing the evolution of the chemically equilibrating quark--gluon plasma system with finite baryon density in a 3+1-dimensional spacetime, we compute photons from the quark phase, hadronic phase and initial non-thermal contributions. It is found that due to the effects of the initial quark chemical potential, chemical equilibration and rapid expansion of the system, the photon yield of the quark--gluon plasma is strongly suppressed, and photons from hadronic matter and initial non-thermal contributions almost reproduce experimental data.
Abstract：Based on a relativistic hydrodynamic model describing the evolution of the chemically equilibrating quark--gluon plasma system with finite baryon density in a 3+1-dimensional spacetime, we compute photons from the quark phase, hadronic phase and initial non-thermal contributions. It is found that due to the effects of the initial quark chemical potential, chemical equilibration and rapid expansion of the system, the photon yield of the quark--gluon plasma is strongly suppressed, and photons from hadronic matter and initial non-thermal contributions almost reproduce experimental data.
LONG Jia-Li;HE Ze-Jun;;MA Yu-Gang;GUAN Na-Na. Photons from Quark and Hadron Phases in Au + Au Collisions[J]. 中国物理快报, 2008, 25(9): 3188-3191.
LONG Jia-Li, HE Ze-Jun, , MA Yu-Gang, GUAN Na-Na. Photons from Quark and Hadron Phases in Au + Au Collisions. Chin. Phys. Lett., 2008, 25(9): 3188-3191.
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2008, Vol. 25 
