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胶子非弹性散射过程对夸克胶子等离子体中双轻子产生的影响

管娜娜

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胶子非弹性散射过程对夸克胶子等离子体中双轻子产生的影响

管娜娜

Effect of inelastic scattering process of gluons on dilepton productions of quark-gluon plasma

Guan Na-Na
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  • 双轻子是研究夸克物质的形成和性质的重要探针. 本文基于化学平衡化的黏滞性夸克胶子等离子体演化模型, 计算了相对论重离子碰撞能量下金-金对心碰撞形成的夸克胶子等离子体中的双轻子产额. 在黏滞性计算中加入了胶子非弹性散射过程对黏滞系数的贡献. 相较仅考虑夸克和胶子弹性散射的情况, 双轻子的产额有较明显的降低. 这表明在黏滞系数中加入胶子非弹性散射的贡献使得系统的演化过程加快, 演化时间变短.
    Dileptons have large mean free paths due to their small cross sections for electromagnetic interaction in plasma. Therefore they are considered to be an important probe for the formation and evolution of the quark matter. In this work, we calculate the dilepton production of quark-gluon plasma (QGP) produced in Au197+ Au197 central collisions at relativistic heavy ion collider (RHIC) energy based on the evolution model of a chemically equilibrating viscous QGP. The evolution of the QGP system is described by a set of coupled relaxation equations containing the master equations of partons, the equation of baryon number conservation and equation of energy-momentum conservation. Solving the set of evolution equations, one can obtain the evolution of temperature T, quark chemical potential q, fugacities q for quarks and g for gluons. To discuss the shear viscosity of QGP, the contributions of the elastic scattering of quarks qqqqand gluons gggg, as well as the inelastic scattering process of gluons ggggg are included. Based on the evolution model including the viscosity, we perform a complete calculation of the dilepton production, including the processes of quark-antiquark annihilation qqll, next-order annihilation qqgll, Compton-like scattering qg qll, qg qll, multiple scattering of quarks, as well as gluon fusion gg cc, annihilation qqcc. It is found that the spectra from the quark-antiquark annihilations qqll and qqgll are dominated. The contributions from multiple scattering cannot be neglected. We also find that the dilepton yields remarkably decrease with considering an additional gluon inelastic process in the calculation compared with the results with considering only elastic scatterings of quarks and gluons. This indicates that the evolution of QGP system is accelerated and the evolution time is shortened by the inelastic scatterings of gluons.
      通信作者: 管娜娜, nn.guan@gmail.com
    • 基金项目: 广西自然科学基金(批准号:2015GXNSFBA139008)、国家自然科学基金(批准号:11402058,11247243)和广西师范学院2015年度学科带头人团队专项(批准号:2015XKDTR10)资助的课题.
      Corresponding author: Guan Na-Na, nn.guan@gmail.com
    • Funds: Project supported by the Natural Science Foundation of Guangxi Zhuang Autonomous Region, China (Grant No. 2015GXNSFBA139008), the National Natural Science Foundation of China (Grant Nos. 11402058, 11247243), and the Guangxi Teachers Education University 2015 Subject Leaders Team, China (Grant No. 2015XKDTR10).
    [1]

    The STAR Collaboration 2014 Phys. Rev. Lett. 113 022301

    [2]

    The PHENIX Collaboration 2016 Phys. Rev. C 93 014904

    [3]

    Rapp R 2013 Nato Asi. 549 353

    [4]

    Rapp R 2013 Adv. High Energy Phys. 2013 148253

    [5]

    Ghisoiu I, Laine M 2014 JHEP 1410 83

    [6]

    Burnier Y, Gastaldi C 2016 Phys. Rev. C 93 044902

    [7]

    He Z J, Long J L, Jiang W Z, Ma Y G, Liu B 2003 Phys. Rev. C 68 024902

    [8]

    Dutta D, Mohanty A K, Kumar K, Choudhury R K 2000 Phys. Rev. C 61 034902

    [9]

    Guan N N, He Z J, Long J L, Cai X Z, Ma YG, Li J W, Shen W Q 2009 Phys. Rev. C 80 014908

    [10]

    Xu Z, Greiner C 2008 Phys. Rev. Lett. 100 172301

    [11]

    Chen J W, Deng J, Dong H, Wang Q 2013 Phys. Rev. C 87 024910

    [12]

    Guan N N, Long J L, Ma Y G, Yuan Y 2013 Europhys. Lett. 103 52001

    [13]

    Kmpfer B, Pavlenko O P, Peshier A, Soff G 1995 Phys. Rev. C 52 2704

    [14]

    Kapusta J, Lichard P, Seibert D 1991 Phys. Rev. D 44 2774

    [15]

    Aurenche P, Gelis F, Moore G D, Zaraket H 2002 J. High Energy Phys. 12 006

  • [1]

    The STAR Collaboration 2014 Phys. Rev. Lett. 113 022301

    [2]

    The PHENIX Collaboration 2016 Phys. Rev. C 93 014904

    [3]

    Rapp R 2013 Nato Asi. 549 353

    [4]

    Rapp R 2013 Adv. High Energy Phys. 2013 148253

    [5]

    Ghisoiu I, Laine M 2014 JHEP 1410 83

    [6]

    Burnier Y, Gastaldi C 2016 Phys. Rev. C 93 044902

    [7]

    He Z J, Long J L, Jiang W Z, Ma Y G, Liu B 2003 Phys. Rev. C 68 024902

    [8]

    Dutta D, Mohanty A K, Kumar K, Choudhury R K 2000 Phys. Rev. C 61 034902

    [9]

    Guan N N, He Z J, Long J L, Cai X Z, Ma YG, Li J W, Shen W Q 2009 Phys. Rev. C 80 014908

    [10]

    Xu Z, Greiner C 2008 Phys. Rev. Lett. 100 172301

    [11]

    Chen J W, Deng J, Dong H, Wang Q 2013 Phys. Rev. C 87 024910

    [12]

    Guan N N, Long J L, Ma Y G, Yuan Y 2013 Europhys. Lett. 103 52001

    [13]

    Kmpfer B, Pavlenko O P, Peshier A, Soff G 1995 Phys. Rev. C 52 2704

    [14]

    Kapusta J, Lichard P, Seibert D 1991 Phys. Rev. D 44 2774

    [15]

    Aurenche P, Gelis F, Moore G D, Zaraket H 2002 J. High Energy Phys. 12 006

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  • 被引次数: 0
出版历程
  • 收稿日期:  2016-03-29
  • 修回日期:  2016-04-25
  • 刊出日期:  2016-07-05

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