Vacuum stability and naturalness in type-II seesaw
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 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.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Alabama, Tuscaloosa, AL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1257502
- Alternate Identifier(s):
- OSTI ID: 1361534; OSTI ID: 1365623
- Grant/Contract Number:
- SC0013680
- Resource Type:
- Published Article
- Journal Name:
- European Physical Journal. C, Particles and Fields
- Additional Journal Information:
- Journal Name: European Physical Journal. C, Particles and Fields Journal Volume: 76 Journal Issue: 6; Journal ID: ISSN 1434-6044
- Publisher:
- Springer
- Country of Publication:
- Germany
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Haba, Naoyuki, Ishida, Hiroyuki, Okada, Nobuchika, and Yamaguchi, Yuya. Vacuum stability and naturalness in type-II seesaw. Germany: N. p., 2016.
Web. doi:10.1140/epjc/s10052-016-4180-z.
Haba, Naoyuki, Ishida, Hiroyuki, Okada, Nobuchika, & Yamaguchi, Yuya. Vacuum stability and naturalness in type-II seesaw. Germany. https://doi.org/10.1140/epjc/s10052-016-4180-z
Haba, Naoyuki, Ishida, Hiroyuki, Okada, Nobuchika, and Yamaguchi, Yuya. Thu .
"Vacuum stability and naturalness in type-II seesaw". Germany. https://doi.org/10.1140/epjc/s10052-016-4180-z.
@article{osti_1257502,
title = {Vacuum stability and naturalness in type-II seesaw},
author = {Haba, Naoyuki and Ishida, Hiroyuki and Okada, Nobuchika and Yamaguchi, Yuya},
abstractNote = {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.},
doi = {10.1140/epjc/s10052-016-4180-z},
journal = {European Physical Journal. C, Particles and Fields},
number = 6,
volume = 76,
place = {Germany},
year = {Thu Jun 16 00:00:00 EDT 2016},
month = {Thu Jun 16 00:00:00 EDT 2016}
}
https://doi.org/10.1140/epjc/s10052-016-4180-z
Web of Science
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