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相对论重离子碰撞手征电荷分离效应的研究

冯笙琴 裴蕾 孙飞 艾鑫 钟洋 殷中宝

冯笙琴, 裴蕾, 孙飞, 艾鑫, 钟洋, 殷中宝. 相对论重离子碰撞手征电荷分离效应的研究[J]. 原子核物理评论, 2017, 34(3): 557-562. doi: 10.11804/NuclPhysRev.34.03.557
引用本文: 冯笙琴, 裴蕾, 孙飞, 艾鑫, 钟洋, 殷中宝. 相对论重离子碰撞手征电荷分离效应的研究[J]. 原子核物理评论, 2017, 34(3): 557-562. doi: 10.11804/NuclPhysRev.34.03.557
FENG Shengqin, PEI Lei, SUN Fei, AI Xin, ZHONG Yang, YIN Zhongbao. Study of Chiral Charge Separation Effect in Relativistic Heavy Ion Collisions[J]. Nuclear Physics Review, 2017, 34(3): 557-562. doi: 10.11804/NuclPhysRev.34.03.557
Citation: FENG Shengqin, PEI Lei, SUN Fei, AI Xin, ZHONG Yang, YIN Zhongbao. Study of Chiral Charge Separation Effect in Relativistic Heavy Ion Collisions[J]. Nuclear Physics Review, 2017, 34(3): 557-562. doi: 10.11804/NuclPhysRev.34.03.557

相对论重离子碰撞手征电荷分离效应的研究

doi: 10.11804/NuclPhysRev.34.03.557
基金项目: 国家自然科学基金资助项目(11475068,11247021);湖北省自然科学基金资助项目(2014CFB671)
详细信息
    作者简介:

    冯笙琴(1967-),男,湖北黄梅人,教授,博士,从事中高能核物理研究;E-mail:fengsq@ctgu.edu.cn

  • 中图分类号: O572.23

Study of Chiral Charge Separation Effect in Relativistic Heavy Ion Collisions

Funds: National Natural Science Foundation of China(11475068, 11247021); Natural Science Foundation of Hubei Province(2014CFB671)
  • 摘要: 相对论重离子碰撞的拓扑荷作用破坏作用平面两侧不同手征性的夸克数目的平衡,从而引起P和CP破坏特征。本工作主要分析RHIC和LHC能区的手征电荷分离作用,分析手征电荷分离随碰撞中心度、碰撞能量和核屏蔽等依赖关系。并未发现手征电荷分离效应与碰撞能量大小有非常紧密的依赖关系,但发现核屏蔽效应对手征电荷分离有重要的影响,与不考虑屏蔽效应相比,考虑屏蔽效应会使手征分离效应明显压低,由于屏蔽效应出现,使得a++a--)的分布与a+-a-+)分布并不对称。并且还发现手征分离效应主要发生在碰撞参量较大的周边碰撞,越接近中心碰撞,手征分离效应几乎可以忽略。


    The topological charge interactions in relativistic heavy ion collisions cause quark chirality imbalance, resulting in charge separation under the strong magnetic field and local P and CP violation. In this paper, the chiral charge separation at RHIC and LHC energies is systematically analyzed as functions of the collision centrality, the collision energy and the nuclear shielding factor. It is found that there is not a very close dependence of the chiral charge separation effect on the collision energies, but that has an important dependence on nuclear shielding factor. Compared with the non-shielding effect, the shielding effect can reduce the chiral separation effect obviously. Due to the shielding effect, the distribution of a++(a--) and the distribution of a+-(a-+) are asymmetric. One also finds that chiral separation effect, which is almost negligible when more close to the central collision, occurs mainly in the peripheral collision for larger impact parameter.
  • [1] FUKUSHIMA K, KHARZEEV D, WARRINGA H J. Physical Reciew D, 2008, 78(7):074033.
    [2] ABELEV B I, AGGARWAL M M, AHAMMED Z, et al. Physical Review Letters, 2009, 103(25):251601.
    [3] ABELEV B I, AGGARWAL M M, AHAMMED Z, et al. Physical Review C, 2010, 81(5):054908.
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    [5] ABELEV B I, ADAM J, ADAMOVA D, et al. Physical Review Letters, 2013, 110(1):012301.
    [6] MO Yujun, FENG Shengqin, SHI Yafei. Physical Review C, 2013, 88(7):024901.
    [7] ZHONG Yang, YANG Chunbin, CAI Xu, et al. Advances in High Energy Physics, 2014, 2014:193039.
    [8] ZHONG Yang, YANG Chunbin, CAI Xu, et al. Shengqin, Chinese Physics C, 2015, 39(10):104105.
    [9] VORONYUK V, TONEEV V D, CASSING W, et al. Physical Review C, 2011, 83(16):054911.
    [10] SKOKOV V, ILLARIONOV A Y, TONEEV V D. International Journal of Modern Physics A, 2009, 24(31):5925.
    [11] DENG Weitian, HUANG Xuguang, Physical Review C, 2012, 85(8):044907.
    [12] KHARZEEV D E, MCLERRAN L D, WARRINGA H J. Nuclear Physics A, 2008, 803:227.
    [13] AARTS G, ALLTON C, FOLEY J, et al. Physical Review Letters, 2007, 99(2):022002.
    [14] DING H T, FRANCIS A, KACZMAREK O, et al. Physical Review D, 2011, 83(3):034504.
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    [17] VOLOSHIN S A. Physical Review C, 2004, 70(5):057901.
    [18] DENG W T, HUANG X G, Physical Review C, 2012, 85(4):044907.
    [19] ABELEV B I, ADAM J, ADAMOVA D, et al. Physical Review C, 2013, 88(4):044909.
    [20] ABELEV B I, AGGARWAL M M, AHAMMED Z, et al. Physical Review C, 2009, 79(3):034909.
    [21] ADAMCZYK L, ADKINS J K, AGAKISHIEV G, et al. Physical Review Letters, 2015, 114(6):252302.
    [22] ABELEV B I, AGGARWAL M M, AHAMMED Z, et al. Physical Review Letters, 2009, 103(25):251601.
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  • PDF下载量:  84
  • 被引次数: 0
出版历程
  • 收稿日期:  2016-12-06
  • 修回日期:  2017-03-30
  • 刊出日期:  2017-07-18

相对论重离子碰撞手征电荷分离效应的研究

doi: 10.11804/NuclPhysRev.34.03.557
    基金项目:  国家自然科学基金资助项目(11475068,11247021);湖北省自然科学基金资助项目(2014CFB671)
    作者简介:

    冯笙琴(1967-),男,湖北黄梅人,教授,博士,从事中高能核物理研究;E-mail:fengsq@ctgu.edu.cn

  • 中图分类号: O572.23

摘要: 相对论重离子碰撞的拓扑荷作用破坏作用平面两侧不同手征性的夸克数目的平衡,从而引起P和CP破坏特征。本工作主要分析RHIC和LHC能区的手征电荷分离作用,分析手征电荷分离随碰撞中心度、碰撞能量和核屏蔽等依赖关系。并未发现手征电荷分离效应与碰撞能量大小有非常紧密的依赖关系,但发现核屏蔽效应对手征电荷分离有重要的影响,与不考虑屏蔽效应相比,考虑屏蔽效应会使手征分离效应明显压低,由于屏蔽效应出现,使得a++a--)的分布与a+-a-+)分布并不对称。并且还发现手征分离效应主要发生在碰撞参量较大的周边碰撞,越接近中心碰撞,手征分离效应几乎可以忽略。


The topological charge interactions in relativistic heavy ion collisions cause quark chirality imbalance, resulting in charge separation under the strong magnetic field and local P and CP violation. In this paper, the chiral charge separation at RHIC and LHC energies is systematically analyzed as functions of the collision centrality, the collision energy and the nuclear shielding factor. It is found that there is not a very close dependence of the chiral charge separation effect on the collision energies, but that has an important dependence on nuclear shielding factor. Compared with the non-shielding effect, the shielding effect can reduce the chiral separation effect obviously. Due to the shielding effect, the distribution of a++(a--) and the distribution of a+-(a-+) are asymmetric. One also finds that chiral separation effect, which is almost negligible when more close to the central collision, occurs mainly in the peripheral collision for larger impact parameter.

English Abstract

冯笙琴, 裴蕾, 孙飞, 艾鑫, 钟洋, 殷中宝. 相对论重离子碰撞手征电荷分离效应的研究[J]. 原子核物理评论, 2017, 34(3): 557-562. doi: 10.11804/NuclPhysRev.34.03.557
引用本文: 冯笙琴, 裴蕾, 孙飞, 艾鑫, 钟洋, 殷中宝. 相对论重离子碰撞手征电荷分离效应的研究[J]. 原子核物理评论, 2017, 34(3): 557-562. doi: 10.11804/NuclPhysRev.34.03.557
FENG Shengqin, PEI Lei, SUN Fei, AI Xin, ZHONG Yang, YIN Zhongbao. Study of Chiral Charge Separation Effect in Relativistic Heavy Ion Collisions[J]. Nuclear Physics Review, 2017, 34(3): 557-562. doi: 10.11804/NuclPhysRev.34.03.557
Citation: FENG Shengqin, PEI Lei, SUN Fei, AI Xin, ZHONG Yang, YIN Zhongbao. Study of Chiral Charge Separation Effect in Relativistic Heavy Ion Collisions[J]. Nuclear Physics Review, 2017, 34(3): 557-562. doi: 10.11804/NuclPhysRev.34.03.557
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