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重夸克偶素产生机制对J/ψ+γ协同产生过程的影响

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高能物理与核物理 2001年第12期25卷 1147-1151页

作者：阎占元段春贵何祯民华北电力大学物理教学部保定071003 河北师范大学物理系石家庄050016

利用推广x重标度模型给出的胶子分布函数计算并讨论了重夸克偶素的色八重态对p -Fe碰撞中J/ ψ和γ协同产生过程微分截面的影响 .结果表明 :色八重态的贡献不可以忽略 .本文的计算结果与未来实验数据的比较。

关键词：重夸克偶素色八重态 NRQCD 推广x重标度模型产生机制胶子分布函数 J/ψ γ 协同产生微分截面

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Inclusive Glueball Production in High-Energy p+p(P) Collisions

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Chinese Physics Letters 2001年第8期18卷 1018-1020页

作者：彭宏安段春贵何祯民 Department of Physics Peking UniversityBeijing 100871 Department of Physics Heibei Teacher’s UniversityShijiazhuang 050016

Using the factorizable character of amplitudes for the double diffractive process in the Landshoff-Nachtmann model,we have discussed the inclusive glueball production in high-energy pp collision via the fusion process of two non-perturbative gluons,and have compared it with double diffractive alike process.We found that,as the c.***.energy Ecms increases from 20 to 20000 GeV,the cross sections of the latter process are about one to two orders larger than the former.Such an outcome could be explained from the hypothesis of duality between glueballs and Promeron.

关键词： process. duality latter

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核Drell-Yan过程与部分子分布的不均匀性

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河北师范大学学报（自然科学版） 2007年第1期31卷 50-55页

作者：刘植凤段春贵苗文丹谢革英石家庄经济学院地动所河北石家庄050000 河北师范大学物理科学与信息工程学院河北石家庄050016 河北建筑工程学院数理系河北张家口075000

通过p A碰撞的核Drell Yan过程研究了核遮蔽效应及其空间相关性.对末态轻子对的观测反映了相互作用点的情况.计算了能量为800 GeV的质子打击Ca,W,Au核的Drell Yan过程与p p碰撞Drell Yan过程的微分截面比.研究发现,在考虑部分子分布的... 详细信息

通过p A碰撞的核Drell Yan过程研究了核遮蔽效应及其空间相关性.对末态轻子对的观测反映了相互作用点的情况.计算了能量为800 GeV的质子打击Ca,W,Au核的Drell Yan过程与p p碰撞Drell Yan过程的微分截面比.研究发现,在考虑部分子分布的空间依赖性后,核Drell Yan的截面会有显著变化.计算结果与未来精确测量p A碰撞核Drell Yan过程的实验数据比较,能够定量地验证部分子分布函数的空间依赖性.

关键词：核遮蔽效应因子核Drell-Yan过程部分子分布的空间依赖性

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Atomic mass,Bjorken variable,and scale dependence of quark transport coefficient in Drell-Yan process for proton incident on nucleus

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Chinese Physics C 2023年第4期47卷 122-131页

作者：许卫杰白天星段春贵 College of Physics and Hebei Advanced Thin Film Laboratory Hebei Normal UniversityShijiazhuang 050024China Hebei University of Environmental Engineering Qinhuangdao 066102China

By means of the nuclear parton distributions determined without the fixed-target Drell-Yan experimental data and the analytic expression of quenching weight based on the BDMPS formalism,next-to-leading order analyses were performed on the Drell-Yan differential cross section ratios from the Fermilab E906 and E866 collaborations.It was found that the results calculated only with the nuclear effects of the parton distribution were not in agreement with the E866 and E906 experimental data.The incoming parton energy loss effect cannot be ignored in the nuclear Drell-Yan reactions.The predicted results indicate that,with the quark transport coefficient as a constant,the suppression due to the target nuclear geometry effect is approximately 16.85%for the quark transport coefficient.It was shown that we should consider the target nuclear geometry effect in studying the Drell-Yan reaction on nuclear targets.On the basis of the Bjorken variable and scale dependence of the quark transport coefficient,the atomic mass dependence was incorporated.The quark transport coefficient was determined as a function of the atomic mass,Bjorken variablex_(2),and scale Q^(2)by the global fit of the experimental data.The determined constant factor q_(0)of the quark transport coefficient is 0.062±0.006 GeV^(2)/fm.It was found that the atomic mass dependence has a significant impact on the constant factor q_(0)in the quark transport coefficient in cold nuclear matter.

关键词： quark transport coefficient Drell-Yan energy loss

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