| Medium Density and Parton Energy Loss in Gold-Gold Collisions from the Recombination Model |
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| 作者姓名： | 杨纯斌 谭志光 |
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| 作者单位： | InstituteofParticlePhysics,HuazhongNormalUniversity,Wuhan430079 |
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| 摘 要： | The pion production at mid-rapidity in gold-gold collisions at √s = 200 GeV is investigated by the parton recombination model. The density of the hot medium produced in the collisions and the hard parton energy loss effect are obtained by fitting the experimental data. Both of them are found to have power-law dependence on the number of binary collisions. The implication of such dependence on the nuclear modification factor is discussed.
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| 关 键 词： | 重离子 碰撞试验 夸克-胶子等离子体 原子效应 |
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