Chin. Phys. Lett.  2008, Vol. 25 Issue (9): 3188-3191    DOI:
Original Articles |
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
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LONG Jia-Li, HE Ze-Jun, MA Yu-Gang et al  2008 Chin. Phys. Lett. 25 3188-3191
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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.
Keywords: 12.38.Mh      25.75.Dw      24.10.Nz     
Received: 05 April 2008      Published: 29 August 2008
PACS:  12.38.Mh (Quark-gluon plasma)  
  25.75.Dw (Particle and resonance production)  
  24.10.Nz (Hydrodynamic models)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2008/V25/I9/03188
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LONG Jia-Li
HE Ze-Jun
MA Yu-Gang
GUAN Na-Na
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