Note on Higgs Decay into Two Photons H -> gamma gamma

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	Note on Higgs Decay into Two Photons H -> gamma gamma
	Wu, YL
刊名	COMMUNICATIONS IN THEORETICAL PHYSICS
	2012
卷号	57 期号:3 页码:427-434
关键词	PRESERVING LOOP REGULARIZATION GAUGE FIELDS BOSON DECAY RENORMALIZATION QFTS
ISSN号	0253-6102
通讯作者	Huang, D (reprint author), Chinese Acad Sci, Inst Theoret Phys, KITPC, SKLTP, Beijing 100190, Peoples R China.
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.
学科主题	Physics
收录类别	SCI
资助信息	National Science Foundation of China [10821504, 10975170]; Chinese Academy of Sciences
原文出处	http://dx.doi.org/10.1088/0253-6102/57/3/14
语种	英语
WOS记录号	WOS:000301920000014
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15151]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Wu, YL. Note on Higgs Decay into Two Photons H -> gamma gamma[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2012,57(3):427-434.
APA	Wu, YL.(2012).Note on Higgs Decay into Two Photons H -> gamma gamma.COMMUNICATIONS IN THEORETICAL PHYSICS,57(3),427-434.
MLA	Wu, YL."Note on Higgs Decay into Two Photons H -> gamma gamma".COMMUNICATIONS IN THEORETICAL PHYSICS 57.3(2012):427-434.