Higgs alignment from multicritical-point principle in two Higgs doublet models
Abstract In models with non-minimal Higgs sectors, enforcing (near) Higgs alignment, necessary to prevent significant deviations in the Higgs boson coupling from the standard model prediction, causes a serious fine-tuning problem. We demonstrate that the Higgs alignment is naturally deduced from the...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-01-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-13824-8 |
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| _version_ | 1832585444307501056 |
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| author | Hikaru Kawai Kiyoharu Kawana Kin-ya Oda Kei Yagyu |
| author_facet | Hikaru Kawai Kiyoharu Kawana Kin-ya Oda Kei Yagyu |
| author_sort | Hikaru Kawai |
| collection | DOAJ |
| description | Abstract In models with non-minimal Higgs sectors, enforcing (near) Higgs alignment, necessary to prevent significant deviations in the Higgs boson coupling from the standard model prediction, causes a serious fine-tuning problem. We demonstrate that the Higgs alignment is naturally deduced from the multicritical point principle (MPP) in the general two Higgs doublet model while keeping non-zero CP-violating phases. Furthermore, we discuss the possibility of realizing the Yukawa alignment from the MPP, which is necessary to prevent flavor-changing neutral currents mediated by Higgs bosons at tree level, and find that it seems difficult to realize it by the MPP due to the non-diagonal structure of the CKM matrix. |
| format | Article |
| id | doaj-art-a4a5712b2d354f1e9ff319f534766437 |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-a4a5712b2d354f1e9ff319f5347664372025-01-26T12:49:40ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-01-0185111210.1140/epjc/s10052-025-13824-8Higgs alignment from multicritical-point principle in two Higgs doublet modelsHikaru Kawai0Kiyoharu Kawana1Kin-ya Oda2Kei Yagyu3Department of Physics and Center for Theoretical Physics, National Taiwan UniversitySchool of Physics, KIASDepartment of Information and Mathematical Sciences, Tokyo Woman’s Christian UniversityDepartment of Physics, Osaka UniversityAbstract In models with non-minimal Higgs sectors, enforcing (near) Higgs alignment, necessary to prevent significant deviations in the Higgs boson coupling from the standard model prediction, causes a serious fine-tuning problem. We demonstrate that the Higgs alignment is naturally deduced from the multicritical point principle (MPP) in the general two Higgs doublet model while keeping non-zero CP-violating phases. Furthermore, we discuss the possibility of realizing the Yukawa alignment from the MPP, which is necessary to prevent flavor-changing neutral currents mediated by Higgs bosons at tree level, and find that it seems difficult to realize it by the MPP due to the non-diagonal structure of the CKM matrix.https://doi.org/10.1140/epjc/s10052-025-13824-8 |
| spellingShingle | Hikaru Kawai Kiyoharu Kawana Kin-ya Oda Kei Yagyu Higgs alignment from multicritical-point principle in two Higgs doublet models European Physical Journal C: Particles and Fields |
| title | Higgs alignment from multicritical-point principle in two Higgs doublet models |
| title_full | Higgs alignment from multicritical-point principle in two Higgs doublet models |
| title_fullStr | Higgs alignment from multicritical-point principle in two Higgs doublet models |
| title_full_unstemmed | Higgs alignment from multicritical-point principle in two Higgs doublet models |
| title_short | Higgs alignment from multicritical-point principle in two Higgs doublet models |
| title_sort | higgs alignment from multicritical point principle in two higgs doublet models |
| url | https://doi.org/10.1140/epjc/s10052-025-13824-8 |
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