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题名: Explicit derivation of the QED trace anomaly in symmetry-preserving loop regularization at one-loop level
作者: Cui, JW ;  Ma, YL ;  Wu, YL
刊名: PHYSICAL REVIEW D
出版日期: 2011
卷号: 84, 期号:2, 页码:25020
关键词: ENERGY-MOMENTUM-TENSOR ;  BETA-FUNCTION ;  RENORMALIZATION ;  ELECTRODYNAMICS ;  QFTS
学科分类: Physics
通讯作者: Cui, JW (reprint author), Tsinghua Univ, Ctr High Energy Phys, Dept Engn Phys, Beijing 100084, Peoples R China.
部门归属: [Cui, Jian-Wei] Tsinghua Univ, Ctr High Energy Phys, Dept Engn Phys, Beijing 100084, Peoples R China; [Ma, Yong-Liang] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan; [Wu, Yue-Liang] Chinese Acad Sci, KITPC, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
英文摘要: The QED trace anomaly is calculated at one-loop level based on the loop regularization method which is realized in 4-dimensional space-time and preserves gauge symmetry and Poincare symmetry in spite of the introduction of two mass scales, namely, the ultraviolet (UV) cutoff M(c) and infrared (IR) cutoff mu(s). It is shown that the dilation Ward identity which relates the three-point diagrams with the vacuum polarization diagrams gets the standard form of trace anomaly through quantum corrections in taking the consistent limit M(c) -> 1 and mu(s) = 0 which recovers the original integrals. This explicitly demonstrates that the loop regularization method is indeed a self-consistent regularization scheme which is applicable to the calculations not only for the chiral anomaly but also for the trace anomaly, at least at one-loop level. It is also seen that the consistency conditions which relate the tensor-type and scalar-type irreducible loop integrals (ILIs) are crucial for obtaining a consistent result. As a comparison, we also present the one-loop calculations by using the usual Pauli-Villars regularization and the dimensional regularization.
资助者: National Nature Science Foundation of China (NSFC) [10975170, 10821504, 10905084]; Chinese Academy of Science; MEXT [2104]; National Science Foundation of China (NNSFC) [10905060]; China Postdoctoral Science Foundation (CPSF) [20090460364]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000293182400002
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14313
Appears in Collections:理论物理所2011年知识产出_期刊论文

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Recommended Citation:
Cui, JW,Ma, YL,Wu, YL. Explicit derivation of the QED trace anomaly in symmetry-preserving loop regularization at one-loop level[J]. PHYSICAL REVIEW D,2011,84(2):25020.
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