Vacuum stability and naturalness in type-II seesaw

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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.

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詳細情報

  • CRID
    1050282813998433536
  • NII論文ID
    120005893294
  • HANDLE
    2115/63796
  • ISSN
    14346044
  • 本文言語コード
    en
  • 資料種別
    journal article
  • データソース種別
    • IRDB
    • CiNii Articles

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