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相对论重离子碰撞中的重味产生
  • ISSN号：1007-4627
  • 期刊名称：《原子核物理评论》
  • 时间：0
  • 分类：O571.6[理学—粒子物理与原子核物理;理学—物理]
  • 作者机构：[1]清华大学物理系,北京100084
  • 相关基金：国家自然科学基金资助项目（10575058,10735040,10975084,11079024）; 国家重点基础研究发展计划（973计划）项目（2007CB815004）~~致谢感谢美国LBNL的许怒博士和清华大学物理系高能核物理组的严力、朱相雷、屈真、周凯、陈保义和李刚同学在研究工作中的讨论和帮助.
作者： 刘云朋[1], 庄鹏飞[1]
关键词： 离子碰撞, QCD相变, 重味压低, heavy ion collision, QCD phase transitions, heavy flavor suppression
中文摘要：

重味粒子是新的物质形态———夸克胶子等离子体的敏感探针。利用相对论流体力学描述夸克胶子等离子体的时空演化,采用输运方程模拟重味粒子在夸克胶子等离子体中的运动,既考虑重味粒子的热胶子离解,也通过细致平衡原理包含重味粒子在热密媒质中的重产生。正是由于离解与重产生之间的竞争以及竞争对于碰撞能量、横动量和快度的依赖性,自然解释了在RHIC能区的J/ψ疑难,预言了在LHC能区由于重产生取得主导地位,J/ψ的核修正因子在中心和半中心碰撞中将随着参与反应核子数的增大而升高,同时其平均横动量会受到强烈的压低。

英文摘要：

Heavy quarkonium is a sensitive signature of the new state of matter-quark-gluon plasma produced in high energy nuclear collisions.We describe the space-time evolution of the quark-gluon plasma by relativistic hydrodynamic equations and the quarkonium motion by transport equation.We found that the competition between the gluon dissociation and regeneration can explain naturally the J/ψ puzzles at RHIC energy.We predict the increase of the nuclear modification factor in semi-central and central collisions and the related transverse momentum suppression at LHC energy.

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期刊信息
  • 《原子核物理评论》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国科学院近代物理研究所 中国核物理学会
  • 主编：肖国青
  • 地址：兰州市31号信箱
  • 邮编：730000
  • 邮箱：npr@impcas.ac.cn
  • 电话：0931-4969371/4
  • 国际标准刊号：ISSN：1007-4627
  • 国内统一刊号：ISSN：62-1131/O4
  • 邮发代号:54-183
  • 获奖情况:
  • 2009年1月获甘肃省优秀期刊奖
  • 国内外数据库收录:
  • 美国化学文摘（网络版）,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:1602