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Vacuum stability and naturalness in type-II seesaw
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| Title: | Vacuum stability and naturalness in type-II seesaw |
| Authors: | Haba, Naoyuki Browse this author | | Ishida, Hiroyuki Browse this author | | Okada, Nobuchika Browse this author | | Yamaguchi, Yuya Browse this author |
| Issue Date: | 17-Jun-2016 |
| Publisher: | Springer |
| Journal Title: | The European physical journal. C, Particles and fields |
| Volume: | 76 |
| Issue: | 6 |
| Start Page: | 333 |
| Publisher DOI: | 10.1140/epjc/s10052-016-4180-z |
| Abstract: | 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. |
| Rights: | The final publication is available at www.springerlink.com | | http://creativecommons.org/licenses/by/4.0 |
| Type: | article |
| URI: | http://hdl.handle.net/2115/63796 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 山口 雄也
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