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题名: Two-Component Description for Relativistic Fermions
作者: Chen Yu-Qi ;  Sang Wen-Long ;  Yang Lan-Fei
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 2009
卷号: 51, 期号:6, 页码:1095-1100
关键词: EFFECTIVE FIELD-THEORY ;  QUARK EFFECTIVE THEORY ;  HEAVY QUARKS ;  AMPLITUDES ;  MESONS ;  LIGHT ;  QCD
学科分类: Physics
通讯作者: Chen, YQ , Acad Sinica, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China
部门归属: [Chen, YQ; Sang, WL; Yang, LF] Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: We propose a two-component form to describe massive relativistic fermions in gauge theories. Relations between the Green's functions in this form and those in the conventional four-component form are derived. It is shown that the S-matrix elements in both forms are exactly the same. The description of the fermion in the new form simplifies significantly the gamma-matrix algebra in the four-component form. In particular, in perturbative calculations the propagator of the fermion is a scalar function. As examples, we use this form to reproduce the relativistic spectrum of hydrodron atom, the S-matrix of e(+)e(-) -> mu(+)mu(-) and QED one-loop vacuum polarization of photon.
资助者: National Natural Science Foundation of China[10475103]
收录类别: SCI
WOS记录号: WOS:000267265700024
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5312
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Chen Yu-Qi,Sang Wen-Long,Yang Lan-Fei. Two-Component Description for Relativistic Fermions[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2009,51(6):1095-1100.
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