Enhancement of Higgs to diphoton decay width in non-perturbative Higgs Model

Haba, Naoyuki; Kaneta, Kunio; Mimura, Yukihiro; Takahashi, Ryo

doi:10.1016/j.physletb.2012.12.049


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Enhancement of Higgs to diphoton decay width in non-perturbative Higgs Model

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/52760

Title:	Enhancement of Higgs to diphoton decay width in non-perturbative Higgs Model
Authors:	Haba, Naoyuki Browse this author
	Kaneta, Kunio Browse this author
	Mimura, Yukihiro Browse this author
	Takahashi, Ryo Browse this author
Issue Date:	29-Jan-2013
Publisher:	Elsevier
Journal Title:	Physics Letters B
Volume:	718
Issue:	4-5
Start Page:	1441
End Page:	1446
Publisher DOI:	10.1016/j.physletb.2012.12.049
Abstract:	We investigate a possibility if a loop diagram via Higgsino can enhance the Higgs to diphoton decay width in supersymmetric models with an extension of Higgs sector. A model with an additional non-renormalizable term of Higgs fields is firstly analyzed where the higher order term can introduce the Higgs coupling to Higgsinos as well as charged Higgs bosons. We point out that a choice of the Higgs coupling to obtain a significant size of enhancement of diphoton decay width reduces the Higgs mass and/or a size of non-renormalizable term needs to be large and a cutoff scale is around the weak scale. Another model in which the Higgsino mass term is generated by a non-perturbative instanton effect via a strong dynamics in a context of SUSY QCD is also suggested. It is shown that the sign of the Higgs coupling to fermions is opposite from perturbative models due to an operator including bosonic fields in the denominator and a constructive contribution to the diphoton decay amplitude can be easily obtained in this kind of model. (C) 2012 Elsevier B.V. All rights reserved.
Relation:	http://www.sciencedirect.com/science/article/pii/S0370269312013020
Type:	article (author version)
URI:	http://hdl.handle.net/2115/52760
Appears in Collections:	理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高橋亮

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