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题名: Quark mass effect on axial charge dynamics
作者: Guo, ED ;  Lin, S
刊名: PHYSICAL REVIEW D
出版日期: 2016
卷号: 93, 期号:10, 页码:105001
学科分类: Astronomy & Astrophysics; Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.93.105001
通讯作者: Guo, ED (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China. ;  Lin, S (reprint author), Sun Yat Sen Univ, Inst Astron & Space Sci, 135 Xingang Xi Rd, Guangzhou 510275, Guangdong, Peoples R China. ;  Guo, ED (reprint author), Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China.
文章类型: Article
英文摘要: We studied the effect of finite quark mass on the dynamics of the axial charge using the D3/D7 model in holography. The mass term in the axial anomaly equation affects both the fluctuation (generation) and dissipation of the axial charge. We studied the dependence of the effect on quark mass and an external magnetic field. For axial charge generation, we calculated the mass diffusion rate, which characterizes the helicity flipping rate. The rate is a nonmonotonous function of mass and can be significantly enhanced by the magnetic field. The diffusive behavior is also related to a divergent susceptibility of the axial charge. For axial charge dissipation, we found that in the long time limit, the mass term dissipates all the charge effectively generated by parallel electric and magnetic fields. The result is consistent with a relaxation time approximation. The rate of dissipation through mass term is a monotonous increasing function of both quark mass and a magnetic field.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: HEAVY-ION COLLISIONS ;  VIOLATION ;  QCD
收录类别: SCI
项目资助者: Sun Yat-Sen University
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21668
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Guo, ED,Lin, S. Quark mass effect on axial charge dynamics[J]. PHYSICAL REVIEW D,2016,93(10):105001.
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