Vacuum stability and naturalness in type-II seesaw
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.
収録刊行物
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- The European physical journal. C, Particles and fields
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The European physical journal. C, Particles and fields 76 (6), 333-, 2016-06-17
Springer
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詳細情報
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- CRID
- 1050282813998433536
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- NII論文ID
- 120005893294
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- HANDLE
- 2115/63796
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- ISSN
- 14346044
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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- IRDB
- CiNii Articles