| An explanation for deviations from the quark number scaling of elliptic flows in low P_T region |
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| 作者姓名： | 姚涛 谢去病 邵凤兰 |
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| 作者单位： | Department of Physics Shandong University，Jinan 250100，China，Department of Physics，Shandong University，Jinan 250100，China，Department of Physics，Qufu Normal University，Qufu 273165，China |
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| 摘 要： | We carry out a systematic study of the different contributions to the deviations of the elliptic flows from the quark number scaling in high energy heavy ion collision in a quark combination model.The effects that we considered are:the resonance decay,the flavor dependence of the quark elliptic flow and the combination of quarks/antiquarks with slightly different transverse momenta.Our results show that the deviations observed in experiments can be well reproduced within the combination framework if all the three effects are considered. We make a detailed analysis of the different contributions using a Monte-Carlo program and suggest measuring the quark number scaling in intermediate P_T range more precisely.
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| 关 键 词： | 原子核物理 夸克 偏差 椭圆流程 |
An explanation for deviations from the quark number scaling of elliptic flows in low PT region |
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| YAO Tao XIE Qu-Bing SHAO Feng-Lan.An explanation for deviations from the quark number scaling of elliptic flows in low P_T region[J].High Energy Physics and Nuclear Physics,2008,32(5). |
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| Authors: | YAO Tao XIE Qu-Bing SHAO Feng-Lan |
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| Institution: | [1]Department of Physics, Shandong University, Jinan 250100, China [2]Department of Physics, Qufu Normal University, Qufu 273165, China |
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| Abstract: | We carry out a systematic study of the different contributions to the deviations of the elliptic flows from the quark number scaling in high energy heavy ion collision in a quark combination model.The effects that we considered are:the resonance decay,the flavor dependence of the quark elliptic flow and the combination of quarks/antiquarks with slightly different transverse momenta.Our results show that the deviations observed in experiments can be well reproduced within the combination framework if all the three effects are considered. We make a detailed analysis of the different contributions using a Monte-Carlo program and suggest measuring the quark number scaling in intermediate P_T range more precisely. |
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| Keywords: | elliptic flow the quark number scaling quark combination model mass hierarchy |
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