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傅永平, 杨海涛, 余功明. 在RHIC和LHC中光子-核子碰撞产生的大横动量双轻子[J]. 原子核物理评论, 2020, 37(2): 166-171. DOI: 10.11804/NuclPhysRev.37.2020008
引用本文: 傅永平, 杨海涛, 余功明. 在RHIC和LHC中光子-核子碰撞产生的大横动量双轻子[J]. 原子核物理评论, 2020, 37(2): 166-171. DOI: 10.11804/NuclPhysRev.37.2020008
Yongping FU, Haitao YANG, Gongming YU. Large Transverse Momentum Dilepton Production from the Photon-nucleon Collisions at RHIC and LHC[J]. Nuclear Physics Review, 2020, 37(2): 166-171. DOI: 10.11804/NuclPhysRev.37.2020008
Citation: Yongping FU, Haitao YANG, Gongming YU. Large Transverse Momentum Dilepton Production from the Photon-nucleon Collisions at RHIC and LHC[J]. Nuclear Physics Review, 2020, 37(2): 166-171. DOI: 10.11804/NuclPhysRev.37.2020008

在RHIC和LHC中光子-核子碰撞产生的大横动量双轻子

Large Transverse Momentum Dilepton Production from the Photon-nucleon Collisions at RHIC and LHC

  • 摘要: 研究了RHIC和LHC能区的Au-Au和Pb-Pb周边重离子碰撞中,来自光子-核子相互作用产生的大横动量双轻子。利用微扰QCD 参数化和Weizsäcker-Williams近似计算了双轻子的产率。经过与领头阶和碎裂过程的双轻子产生数值计算结果相比较,光-核碰撞过程产生的大横动量双轻子在RHIC能区是可忽略的。但是在LHC能区,光-核碰撞在大横动量区域是周边重离子碰撞的一个重要的双轻子源。

     

    Abstract: We study the large transverse momentum dilepton produced by the photon-nucleon interactions in the peripheral Au-Au collisions at RHIC and Pb-Pb collisions at LHC. We calculate the dilepton production yield by using the perturbative QCD factorization approach and the Weizsäcker-Williams approximation. The numerical results indicate that the photon-nucleon collision processes is negligible by comparing with the conventional large transverse momentum dilepton production at RHIC energies. However, in the large transverse momentum region, the photon-nucleon collision could be an important large transverse momentum dilepton source in the peripheral heavy ion collisions at LHC.

     

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