| 高能重离子碰撞中正负荷电粒子比单事例起伏研究 |
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| 引用本文： | 周代梅,蔡勖,刘志毅,陆中道,萨本豪. 高能重离子碰撞中正负荷电粒子比单事例起伏研究[J]. 中国物理 C, 2002, 26(12): 1271-1276 |
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| 作者姓名： | 周代梅 蔡勖 刘志毅 陆中道 萨本豪 |
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| 作者单位： | [1]华中师范大学粒子物理研究所，武汉430079 [2]中国原子能科学研究院，北京102413 |
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| 基金项目： | 国家自然科学基金 (1 0 0 75 0 3 5 ,1 9975 0 75 )资助~~ |
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| 摘 要： | 用强子和弦级联模型,JPCIAE及相应的Monte Carlo事例产生器,研究相对论性核–核碰撞中有限快度区间内正负荷电粒子比单事例起伏与能量、中心度、共振态衰变及快度间隔的关系.JPCIAE模型能够较好地符合CERN/SPS能区Pb+Pb碰撞的实验结果.本文还用此模型预言了RHIC能区Au+Au碰撞和ALICE能区Pb+Pb碰撞中的正负荷电粒子比单事例起伏.可以看出碰撞能量、中心度、共振态衰变及快度间隔对正负荷电粒子比单事例起伏的影响都不大.
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| 关 键 词： | 相对论性核–核碰撞 正负荷电粒子比 单事例起伏 JPCIAE模型 |
| 收稿时间： | 2002-01-08 |
Study of Event-by-Event Fluctuations in the Charged Particle Ratio in High Energy Heavy-Ion Collisions |
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| ZHOU Dai-Mei ,) CAI Xu LIU Zhi-Yi LU Zhong-Dao SA Ben-Hao. Study of Event-by-Event Fluctuations in the Charged Particle Ratio in High Energy Heavy-Ion Collisions[J]. High Energy Physics and Nuclear Physics, 2002, 26(12): 1271-1276 |
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| Authors: | ZHOU Dai-Mei ) CAI Xu LIU Zhi-Yi LU Zhong-Dao SA Ben-Hao |
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| Affiliation: | ZHOU Dai-Mei 1,1) CAI Xu1 LIU Zhi-Yi2 LU Zhong-Dao2 SA Ben-Hao2 1 |
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| Abstract: | Using a hadron and string cascade model,JPCIAE,and the corresponding Monte Carlo events generator,the behavior of the charged particle ratio event-by-event fluctuations in subsystem depending on energy,centrality,resonance decay and rapidity interval was investigated for Pb+Pb collisions at SPS and ALICE energies,and for Au+Au collisions at RHIC energies. The model results of charged particle ratio event-by-event fluctuations as a function of the rapidity interval in Pb+Pb collisions at SPS energies were comparable with the preliminary NA49 data. It turned out that the charged particle ratio fluctuation has no strong energy,centrality,resonance decay and rapidity interval dependences. |
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| Keywords: | relativistic nucleus-nucleus collisions charged particle ratio event-by-event fluctuations hadron and string cascade model JPCIAE |
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