| 利用NEXUS模型对质心系碰撞能量200 GeV的Au+Au碰撞中质子-反质子产额比的研究 |
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| 引用本文： | 李会红,刘复明,刘峰.利用NEXUS模型对质心系碰撞能量200 GeV的Au+Au碰撞中质子-反质子产额比的研究[J].华中师范大学学报(自然科学版),2002,36(2):155-160. |
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| 作者姓名： | 李会红 刘复明 刘峰 |
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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： | The research was supported in part by National Natural Science Foundation of China(1 9975 0 1 8,1 9775 0 1 8) |
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| 摘 要： | 采用一种新的强相互作用模型--NEXUS产生器产生数据,研究了质心系能量s
NN=200 GeV 时Au+Au碰撞下的质子-反质子产额比,讨论了不同横动量和快度区间内产额比对碰撞对心度的依赖性.发现中心快度区的质子-反质子产额比不明显依赖于碰撞对心度、横动量和快度;对于快度和横动量在|y|＜1.0
和 pt＜1. 0 GeV条件下的最小无偏碰撞事件中,NEXUS模型的质子-反质子产额比为0.943±0.002
(stat.).
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| 关 键 词： | NEXUS模型 质心系 碰撞 能量 质子－反质子产额比 对心度 |
Study anti-proton to proton ratio from Au+Au collisions at ()sNN=200 GeV in NE XUS model |
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| Abstract.Study anti-proton to proton ratio from Au+Au collisions at ()sNN=200 GeV in NE XUS model[J].Journal of Central China Normal University(Natural Sciences),2002,36(2):155-160. |
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| Authors: | Abstract |
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| Abstract: | This paper studies the mid-rapidity anti-proton to proton ratio in Au+Au colli sions at sNN=200 GeV. The data is generated with NEXUS model, which is a new hadronic interaction model.The dependence of the ratio on centra lity is presented within different regions of transverse momentum and rapidity. As a result, there is no strong centrality dependence for the mid-rapidity rati o. The /p ratio in the range of mid-rapidity is independent of eith er transverse momentum or rapidity. The average mid-rapidity ratio in this mod el is 0.943±0.002(stat.) for minimum bias collisions within the rapidity and transverse momentum range of |y|＜1.0 and pt＜1.0 GeV. |
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| Keywords: | NEXUS /pratio centrality |
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