| 重夸克在密度介质中的能量损失 |
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| 引用本文： | 周代翠,向文昌,毛亚显.重夸克在密度介质中的能量损失[J].华中师范大学学报(自然科学版),2005,39(4):482-486. |
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| 作者姓名： | 周代翠 向文昌 毛亚显 |
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| 作者单位： | 华中师范大学,粒子物理研究所,武汉,430079;华中师范大学,粒子物理研究所,武汉,430079;华中师范大学,粒子物理研究所,武汉,430079 |
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| 基金项目： | This work is supported by the National Natural Science Foundation of China （Grant No 10575044 and 10075022）, and the funds of China Ministry of Education. |
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| 摘 要： | 基于G—W模型．讨论了高能重离子碰撞中热密QCD介质诱导胶子辐射所导致的部分子能量损失；采用光锥路径积分（LCPI）方法研究了有限的夸克胶子等离子体（QGP）区域中重夸克能量损失，导出了计算能量损失的解析表达式．计算结果显示，考虑了质量效应的重夸克辐射能量损失较忽略质量的轻夸克辐射能量损失有明显的压低；对高能夸克，其辐射能量损失与介质长度的平方成正比，随着能量的降低，平方关系变为线性依赖．
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| 关 键 词： | 高能重离子碰撞 光锥路径积分(LCPI)方法 诱导胶子辐射 重夸克能量损失 |
| 文章编号： | 1000-1190（2005）04-0482-05 |
| 收稿时间： | 08 20 2005 12:00AM |
| 修稿时间： | 2005-08-20 |
Heavy quark energy loss in dense medium |
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| ZHOU Dai-cui,XIANG Wen-chang,MAO Ya-xian.Heavy quark energy loss in dense medium[J].Journal of Central China Normal University(Natural Sciences),2005,39(4):482-486. |
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| Authors: | ZHOU Dai-cui XIANG Wen-chang MAO Ya-xian |
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| Institution: | Institute of Particle Physics, Central China Normal University, Wuhan 430079 |
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| Abstract: | Based on G-W model and the light-cone path integral approach, induced gluon radiation and energy loss of heavy quark in dense QCD medium are discussed. An analytical formula of the energy loss of heavy quark is derived. The results show that the quark energy loss obviously depends on the mass of quark, i. e. a remarkable suppression occurs in the case of heavy quark comparing to a light one. The radiative energy loss of energetic quark is proportional to L2 , where L is the length of the medium. The dependence of energy loss on L2 turns to L with decreasing quark energy. |
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| Keywords: | high energy heavy-ion collision light-cone path integral approach induced gluon radiation heavy quark energy loss |
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