Muon specific two-Higgs-doublet model
Abstract We investigate a new type of a two-Higgs-doublet model as a solution of the muon g − 2 anomaly. We impose a softly-broken Z 4 symmetry to forbid tree level flavor changing neutral currents in a natural way. This Z 4 symmetry restricts the structure of Yukawa couplings. As a result, extra Hi...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2017-07-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP07(2017)012 |
| _version_ | 1828370061117620224 |
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| author | Tomohiro Abe Ryosuke Sato Kei Yagyu |
| author_facet | Tomohiro Abe Ryosuke Sato Kei Yagyu |
| author_sort | Tomohiro Abe |
| collection | DOAJ |
| description | Abstract We investigate a new type of a two-Higgs-doublet model as a solution of the muon g − 2 anomaly. We impose a softly-broken Z 4 symmetry to forbid tree level flavor changing neutral currents in a natural way. This Z 4 symmetry restricts the structure of Yukawa couplings. As a result, extra Higgs boson couplings to muons are enhanced by a factor of tan β, while their couplings to all the other standard model fermions are suppressed by cot β. Thanks to this coupling property, we can avoid the constraint from leptonic τ decays in contrast to the lepton specific two-Higgs-doublet model, which can explain the muon g − 2 within the 2σ level but cannot within the 1σ level due to this constraint. We find that the model can explain the muon g − 2 within the 1σ level satisfying constraints from perturbative unitarity, vacuum stability, electroweak precision measurements, and current LHC data. |
| first_indexed | 2024-04-14T06:32:51Z |
| format | Article |
| id | doaj.art-bc9225b0608a4d21930a093f69dcc309 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-14T06:32:51Z |
| publishDate | 2017-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-bc9225b0608a4d21930a093f69dcc3092022-12-22T02:07:34ZengSpringerOpenJournal of High Energy Physics1029-84792017-07-012017712310.1007/JHEP07(2017)012Muon specific two-Higgs-doublet modelTomohiro Abe0Ryosuke Sato1Kei Yagyu2Institute for Advanced Research, Nagoya UniversityDepartment of Particle Physics and Astrophysics, Weizmann Institute of ScienceINFN, Sezione di Firenze, and Department of Physics and Astronomy, University of FlorenceAbstract We investigate a new type of a two-Higgs-doublet model as a solution of the muon g − 2 anomaly. We impose a softly-broken Z 4 symmetry to forbid tree level flavor changing neutral currents in a natural way. This Z 4 symmetry restricts the structure of Yukawa couplings. As a result, extra Higgs boson couplings to muons are enhanced by a factor of tan β, while their couplings to all the other standard model fermions are suppressed by cot β. Thanks to this coupling property, we can avoid the constraint from leptonic τ decays in contrast to the lepton specific two-Higgs-doublet model, which can explain the muon g − 2 within the 2σ level but cannot within the 1σ level due to this constraint. We find that the model can explain the muon g − 2 within the 1σ level satisfying constraints from perturbative unitarity, vacuum stability, electroweak precision measurements, and current LHC data.http://link.springer.com/article/10.1007/JHEP07(2017)012Beyond Standard ModelHiggs Physics |
| spellingShingle | Tomohiro Abe Ryosuke Sato Kei Yagyu Muon specific two-Higgs-doublet model Journal of High Energy Physics Beyond Standard Model Higgs Physics |
| title | Muon specific two-Higgs-doublet model |
| title_full | Muon specific two-Higgs-doublet model |
| title_fullStr | Muon specific two-Higgs-doublet model |
| title_full_unstemmed | Muon specific two-Higgs-doublet model |
| title_short | Muon specific two-Higgs-doublet model |
| title_sort | muon specific two higgs doublet model |
| topic | Beyond Standard Model Higgs Physics |
| url | http://link.springer.com/article/10.1007/JHEP07(2017)012 |
| work_keys_str_mv | AT tomohiroabe muonspecifictwohiggsdoubletmodel AT ryosukesato muonspecifictwohiggsdoubletmodel AT keiyagyu muonspecifictwohiggsdoubletmodel |