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题名: Note on Higgs Decay into Two Photons H -> gamma gamma
作者: Huang, D ;  Tang, Y ;  Wu, YL
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 2012
卷号: 57, 期号:3, 页码:427-434
关键词: PRESERVING LOOP REGULARIZATION ;  GAUGE FIELDS ;  BOSON DECAY ;  RENORMALIZATION ;  QFTS
学科分类: Physics
通讯作者: Huang, D (reprint author), Chinese Acad Sci, Inst Theoret Phys, KITPC, SKLTP, Beijing 100190, Peoples R China.
部门归属: [Huang Da; Wu Yue-Liang] Chinese Acad Sci, Inst Theoret Phys, KITPC, SKLTP, Beijing 100190, Peoples R China; [Tang Yong] Natl Ctr Theoret Sci, Div Phys, Hsinchu, Taiwan
英文摘要: The Higgs decay H -> gamma gamma due to the virtual W-loop effect is revisited in the unitary gauge by using the symmetry-preserving and divergent-behavior-preserving loop regularization method, which is realized in the four-dimensional space-time without changing original theory. Though the one-loop amplitude of H -> gamma gamma is finite as the Higgs boson in the standard model has no direct interaction with the massless photons at tree level, it involves both tensor-type and scalar-type divergent integrals which can in general destroy the gauge invariance without imposing a proper regularization scheme to make them well-defined. As the loop regularization scheme can ensure the consistency conditions between the regularized tensor-type and scalar-type divergent irreducible loop integrals to preserve gauge invariance, we explicitly show the absence of decoupling in the limit M-W/M-H -> 0 and obtain a result agreeing exactly with the earlier one in the literature. We then clarify the discrepancy of the earlier result from the recent one obtained by R. Gastmans, S.L. Wu and T.T. Wu. The advantage of calculation in the unitary gauge becomes manifest in that the non-decoupling arises from the longitudinal contribution of the W gauge boson.
资助者: National Science Foundation of China [10821504, 10975170]; Chinese Academy of Sciences
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000301920000014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15151
Appears in Collections:理论物理所2012年知识产出_期刊论文

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Recommended Citation:
Huang, D,Tang, Y,Wu, YL. Note on Higgs Decay into Two Photons H -> gamma gamma[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2012,57(3):427-434.
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