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Title: Vacuum stability and naturalness in type-II seesaw

Journal Article · · European Physical Journal. C, Particles and Fields

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 natural- ness 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 → γγ, Zγ) deviate from the standard model, and a large parameter region is excluded by the recent ATLAS and CMS combined analysis of h → γ γ . 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.

Research Organization:
Univ. of Alabama, Tuscaloosa, AL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC0013680
OSTI ID:
1257502
Alternate ID(s):
OSTI ID: 1361534; OSTI ID: 1365623
Journal Information:
European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Vol. 76 Journal Issue: 6; ISSN 1434-6044
Publisher:
SpringerCopyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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