| THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
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Strangeness by Thermal Model Simulation at RHIC |
SHI Xing-Hua, MA Yu-Gang, CAI Xiang-Zhou, CHEN Jin-Hui, MA Guo-Liang,
ZHONG Chen |
| Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800 |
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| Cite this article: |
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SHI Xing-Hua, MA Yu-Gang, CAI Xiang-Zhou et al 2009 Chin. Phys. Lett. 26 061202 |
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Abstract The local temperature effect on strangeness enhancement in relativistic heavy ion collisions is discussed in the framework of the thermal model in which the K+/h+ ratio becomes smaller with increasing freeze-out temperature. Considering that most strangeness particles of final-state particles are from the kaon meson, the temperature effect may play a role in strangeness production in hot dense matter where a slightly different temperature distribution in different areas could be produced by jet energy loss. This phenomenon is predicted by thermal model calculation at RHIC energy. The Ξ-/Φ ratio in central Au+Au collisions at 200GeV from the thermal model depends on the freeze-out temperature obviously when γS is different. It should be one of the reasons why strangeness enhancements of Ξ and Φ are different though they include two strange quarks. These results indicate that thermodynamics is an important factor for strangeness production and the strangeness enhancement phenomenon.
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| Keywords:
12.38.Mh
25.75.-q
24.10.Nz
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Received: 05 March 2009
Published: 01 June 2009
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| PACS: |
12.38.Mh
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(Quark-gluon plasma)
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25.75.-q
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(Relativistic heavy-ion collisions (collisions induced by light ions studied to calibrate relativistic heavy-ion collisions should be classified under both 25.75.-q and sections 13 or 25 appropriate to the light ions))
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24.10.Nz
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(Hydrodynamic models)
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