搜索

x

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

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

引用本文:
Citation:

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
PDF
导出引用
  • 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

  • [1] 高建华, 黄旭光, 梁作堂, 王群, 王新年. 强相互作用自旋-轨道耦合与夸克-胶子等离子体整体极化. 物理学报, 2023, 72(7): 072501. doi: 10.7498/aps.72.20230102
    [2] 张善良, 邢宏喜, 王恩科. 相对论重离子碰撞中的喷注淬火效应. 物理学报, 2023, 72(20): 200304. doi: 10.7498/aps.72.20230993
    [3] 江泽方, 吴祥宇, 余华清, 曹杉杉, 张本威. RHIC能区Au+Au 碰撞中带电粒子直接流与超子整体极化的计算与分析. 物理学报, 2023, 72(7): 072504. doi: 10.7498/aps.72.20222391
    [4] 杨帅, 唐泽波, 杨驰, 查王妹. 相对论重离子碰撞中光子-光子相互作用的碰撞参数依赖性. 物理学报, 2023, 72(20): 201201. doi: 10.7498/aps.72.20230948
    [5] 郑殊, 张甲鹏, 段萍, 魏来, 王先驱. 黏滞等离子体中双撕裂模不稳定性的数值模拟研究. 物理学报, 2013, 62(2): 025205. doi: 10.7498/aps.62.025205
    [6] 李永强, 吴建华, 袁建民. 等离子体屏蔽效应对原子能级和振子强度的影响. 物理学报, 2008, 57(7): 4042-4048. doi: 10.7498/aps.57.4042
    [7] 贺泽君, 龙家丽, 马国亮, 马余刚, 张家驹, 刘 波. 化学非平衡夸克-胶子物质中等质量双轻子的产生. 物理学报, 2003, 52(11): 2831-2835. doi: 10.7498/aps.52.2831
    [8] 贺泽君, 周文杰, 蒋维洲, 张家驹, 刘波. 膨胀的热夸克胶子物质的中等质量双轻子的增强. 物理学报, 2002, 51(6): 1312-1316. doi: 10.7498/aps.51.1312
    [9] 贺泽君, 蒋维渊, 朱志远, 刘 波. 夸克-胶子等离子体在相对论性核-核碰撞中形成的一种信号. 物理学报, 2000, 49(5): 911-914. doi: 10.7498/aps.49.911
    [10] 林大航, 谢凤仙. 考虑胶子质量的重夸克偶素位模型(续). 物理学报, 1984, 33(11): 1569-1580. doi: 10.7498/aps.33.1569
    [11] 何祚庥, 林大航, 赵培贞. 考虑胶子质量的重夸克偶素位模型. 物理学报, 1982, 31(4): 525-531. doi: 10.7498/aps.31.525
    [12] 罗辽复, 陆埮. 奇异粒子的非轻子衰变和层子模型. 物理学报, 1975, 24(2): 105-114. doi: 10.7498/aps.24.105
    [13] 罗辽复, 陆埮, 杨国琛. 论反常作用、轻子结构和μ-e质量差. 物理学报, 1966, 22(3): 334-340. doi: 10.7498/aps.22.334
    [14] 杨国琛, 陆埮, 罗辽复. 中间玻色子理论Ⅱ.超子的非轻子衰变. 物理学报, 1966, 22(9): 1032-1037. doi: 10.7498/aps.22.1032
    [15] 宋行长. 轻子与非轻子弱相互作用的唯象描述. 物理学报, 1965, 21(1): 218-220. doi: 10.7498/aps.21.218
    [16] 阮同泽, 陈时. K+介子的三体轻子衰变. 物理学报, 1965, 21(4): 779-786. doi: 10.7498/aps.21.779
    [17] 宋行长. Cabibbo理论与非轻子衰变. 物理学报, 1965, 21(2): 469-470. doi: 10.7498/aps.21.469
    [18] 陈启洲. 么正对称性和超子的非轻子衰变. 物理学报, 1965, 21(11): 1915-1918. doi: 10.7498/aps.21.1915
    [19] 宋行长. 超子的非轻子衰变与么正对称性. 物理学报, 1964, 20(10): 1048-1052. doi: 10.7498/aps.20.1048
    [20] 戴元本. 弱作用对轻子电磁性质的影响. 物理学报, 1961, 17(11): 512-519. doi: 10.7498/aps.17.512
计量
  • 文章访问数:  4664
  • PDF下载量:  234
  • 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

/

返回文章
返回