| 重离子碰撞对QCD物质的若干检验 |
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| 引用本文： | 刘植凤.重离子碰撞对QCD物质的若干检验[J].云南大学学报(自然科学版),2015,37(1):73-77. |
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| 作者姓名： | 刘植凤 |
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| 作者单位： | 石家庄经济学院 地球动力研究所,河北 石家庄 050031 |
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| 基金项目： | 国家自然科学基金(10575028);河北省教育厅课题(2011126).
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| 摘 要： | 采用重新拟合的σJ/ψN数据计算核吸收效应,并结合能量损失以及核遮蔽效应因子.研究了E866、RHIC和HERA上J/ψ粒子产生中微分截面比R的xF（或y）分布,结果与最新的实验数据进行了对比.结论表明：所选用的介质效应模型能较好地再现实验数据,体现冷核效应的幅度,尤其是RHIC的正快度区域(y＞0）及HERA的负xF区域.文末还给出了对LHC上产值数据的预言.对冷核介质效应的研究,能协助甄别热核反应中的产值抑制是否预言中夸克-胶子等离子体形成的标志,从而有助于对QCD物质特征的检验.
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| 关 键 词： | 量子色动力学 核介质效应 能量损失效应 核吸收效应 核遮蔽效应 |
Some important test to the QCD matter with heavy ion collisions |
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| LIU Zhi-feng.Some important test to the QCD matter with heavy ion collisions[J].Journal of Yunnan University(Natural Sciences),2015,37(1):73-77. |
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| Authors: | LIU Zhi-feng |
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| Institution: | Institute of Geophysics,Shijiazhuang Economic University,Shijiazhuang 050031,China |
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| Abstract: | By applying a new fitting parameter σJ/ψN ,we''ve calculated the differential cross section ratio Rof J/ψ in high energy p-A and p-p collisions with three different nuclear medium effects.The plots of R vs.xF (y) calculated with selected nuclear effect models have been presented under E866,HERA,RHIC and LHC energy.By a comparison with the experimental data published recently,we''ve found that the results can reproduce the trend and magnitude of data,especially at the positive rapidity of RHIC and the negative of xF HERA.Our conclusion is helpful to identify the difference between the sign of quark-gluon formation and production suppression caused by cold nuclear effects,which is also an important test to the QCD matter in heavy ion collisions. |
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| Keywords: | quantum chromodynamics nuclear medium effect nuclear energy loss effect nuclear absorption effect nuclear shadowing effect |
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