摘要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.
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.
(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))
SHI Xing-Hua;MA Yu-Gang;CAI Xiang-Zhou;CHEN Jin-Hui; MA Guo-Liang;ZHONG Chen. Strangeness by Thermal Model Simulation at RHIC[J]. 中国物理快报, 2009, 26(6): 61202-061202.
SHI Xing-Hua, MA Yu-Gang, CAI Xiang-Zhou, CHEN Jin-Hui, MA Guo-Liang, ZHONG Chen. Strangeness by Thermal Model Simulation at RHIC. Chin. Phys. Lett., 2009, 26(6): 61202-061202.
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