| 粲夸克辐射的死区效应 |
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| 引用本文： | 张晓明,朱燕,何云存,周代翠.粲夸克辐射的死区效应[J].中国物理 C,2007,31(1):43-47. |
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| 作者姓名： | 张晓明 朱燕 何云存 周代翠 |
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| 作者单位： | 华中师范大学粒子物理研究所,武汉430079 |
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| 基金项目： | 国家自然科学基金
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教育部科学与技术研究重大项目基金 |
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| 摘 要： | 基于轻夸克辐射能量谱, 考虑夸克质量对部分子辐射能量损失的影响, 利用死区因子把轻部分子辐射能量损失谱推广到重部分子辐射能量损失的情形. 研究结果表明, 利用与夸克质量相关的死区因子推广轻夸克辐射能量损失谱得到的重夸克辐射能量损失谱, 与直接利用微扰QCD计算所得到的Djordjevic-Gyulassy(D-G)谱的结果一致, 且极大简化了重夸克辐射能量损失的计算.
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| 关 键 词： | 高能重离子碰撞 粲夸克辐射能量损失 死区效应 |
| 收稿时间： | 2006-4-20 |
| 修稿时间： | 2006-04-20 |
Dead Cone Effect of Charm Quark Radiation |
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| ZHANG Xiao-Ming,ZHU Yan,HE Yun-Chun,ZHOU Dai-Cui.Dead Cone Effect of Charm Quark Radiation[J].High Energy Physics and Nuclear Physics,2007,31(1):43-47. |
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| Authors: | ZHANG Xiao-Ming ZHU Yan HE Yun-Chun ZHOU Dai-Cui |
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| Institution: | Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China |
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| Abstract: | Radiative energy loss rate of heavy quark traversing through thermal dense matter which is formed in heavy ion collisions has been studied under an assumption of valid factorized method, in which light quark radiative spectrum is used to multiply an dead-cone factor depending on quark mass and energy. The numerical calculated results with energies at RHIC and LHC show that the heavy quark radiation spectra, obtained by extending light quark energy spectrum, are approximately consistent with that calculated under pQCD frame by Djordjecvico-Guulassy. The calculation is simplified by using of factorial dead cone factor and equivalent results can be obtained. |
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| Keywords: | high-energy heavy ion collision charm quark radiative energy loss dead-cone effect |
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