Vacuum Stability and Naturalness in Type-II Seesaw

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dc.rights.license Attribution 4.0 International (CC BY 4.0) en_US Okada, Nobuchika 2019-06-10T18:26:17Z 2019-06-10T18:26:17Z 2016-06-16
dc.identifier.citation Haba, N., Ishida, H., Okada, N., Yamaguchi, Y. (2016): Vacuum Stability and Naturalness in Type-II Seesaw. The European Physical Journal C. DOI: en_US
dc.description.abstract We study the vacuum stability and perturbativity conditions in the minimal type-II seesaw model. 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 350GeV, 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→γγ,Zγ) deviate from the standard model, and a large parameter region is excluded by the recent ATLAS and CMS combined analysis of h→γγ. Our result of the signal strength for h→γγ is Rγγ≲1.1, but its deviation is too small to observe at the LHC experiment. en_US
dc.format.mimetype application/pdf en_US
dc.language English en_US
dc.subject Standard Model Fermion en_US
dc.subject Vacuum Stability en_US
dc.subject Quartic Coupling en_US
dc.subject Charged Higgs Boson en_US
dc.subject Higgs Mass Correction en_US
dc.title Vacuum Stability and Naturalness in Type-II Seesaw en_US
dc.type text en_US

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