Vacuum stability and naturalness in type-II seesaw

Haba, Naoyuki; Ishida, Hiroyuki; Okada, Nobuchika; Yamaguchi, Yuya

Vacuum stability and naturalness in type-II seesaw

Haba, Naoyuki; Ishida, Hiroyuki; Okada, Nobuchika et al.

The European physical journal. C, Particles and fields, 2016, 76(6), 333

Permalink : https://hdl.handle.net/2115/63796

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アクセス権	open access
URI	https://hdl.handle.net/2115/63796
タイトル	Vacuum stability and naturalness in type-II seesaw
著者	Haba, Naoyuki ; Ishida, Hiroyuki ; Okada, Nobuchika ; Yamaguchi, Yuya
著者名 Haba, Naoyuki
著者名 Ishida, Hiroyuki
著者名 Okada, Nobuchika
著者名 Yamaguchi, Yuya
言語	英語
発行日	2016-06-17
出版者	Springer
収録物名	The European physical journal. C, Particles and fields
巻(号)	76(6)
ページ	333
抄録	We study the vacuum stability and perturbativity conditions in theminimal type-II seesawmodel. These conditions give characteristic constraints to the model parameters. In the model, there is a SU(2)(L) triplet scalar field, which could cause a large Higgs mass correction. From the naturalness point of view, heavy Higgs masses should be lower than 350 GeV, which may be testable by the LHC Run-II results. Due to the effects of the triplet scalar field, the branching ratios of the Higgs decay (h -> gamma gamma, Z gamma) deviate from the standard model, and a large parameter region is excluded by the recent ATLAS and CMS combined analysis of h -> gamma gamma. Our result of the signal strength for h -> gamma gamma is R-gamma gamma less than or similar to 1.1, but its deviation is too small to observe at the LHC experiment.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 4.0 International
権利情報	The final publication is available at www.springerlink.com
PISSN	1434-6044
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1140/epjc/s10052-016-4180-z