Electron electric dipole moment and electroweak baryogenesis in a complex singlet extension of the Standard Model with degenerate scalars
We study the possibility of electroweak baryogenesis in the standard model with a complex scalar field, focusing mainly on a degenerate scalar scenario. In our setup, CP violation is provided by dimensional-5 Yukawa interactions involving the complex scalar field. In contrast to previous studies in...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269323006664 |
| _version_ | 1797363821055049728 |
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| author | Chikako Idegawa Eibun Senaha |
| author_facet | Chikako Idegawa Eibun Senaha |
| author_sort | Chikako Idegawa |
| collection | DOAJ |
| description | We study the possibility of electroweak baryogenesis in the standard model with a complex scalar field, focusing mainly on a degenerate scalar scenario. In our setup, CP violation is provided by dimensional-5 Yukawa interactions involving the complex scalar field. In contrast to previous studies in the literature, we exemplify a case in which a complex phase in the singlet scalar potential is transmitted to the fermion sector via the higher-dimensional operators and drives BAU. We point out that an electric dipole moment of the electron can be suppressed due to the Higgs mass degeneracy and the presence of a new electron Yukawa coupling. Thus, viable parameter space for electroweak baryogenesis is still wide open for the latest experimental bound set by the JILA Collaboration. |
| first_indexed | 2024-03-08T16:26:27Z |
| format | Article |
| id | doaj.art-98d54947cd1b4caca59aae048f4e1c9c |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-03-08T16:26:27Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-98d54947cd1b4caca59aae048f4e1c9c2024-01-07T04:27:52ZengElsevierPhysics Letters B0370-26932024-01-01848138332Electron electric dipole moment and electroweak baryogenesis in a complex singlet extension of the Standard Model with degenerate scalarsChikako Idegawa0Eibun Senaha1Graduate school of Humanities and Sciences, Ochanomizu University, Tokyo 112-8610, JapanSubatomic Physics Research Group, Science and Technology Advanced Institute, Van Lang University, Ho Chi Minh City, Viet Nam; Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, Viet Nam; Corresponding author.We study the possibility of electroweak baryogenesis in the standard model with a complex scalar field, focusing mainly on a degenerate scalar scenario. In our setup, CP violation is provided by dimensional-5 Yukawa interactions involving the complex scalar field. In contrast to previous studies in the literature, we exemplify a case in which a complex phase in the singlet scalar potential is transmitted to the fermion sector via the higher-dimensional operators and drives BAU. We point out that an electric dipole moment of the electron can be suppressed due to the Higgs mass degeneracy and the presence of a new electron Yukawa coupling. Thus, viable parameter space for electroweak baryogenesis is still wide open for the latest experimental bound set by the JILA Collaboration.http://www.sciencedirect.com/science/article/pii/S0370269323006664 |
| spellingShingle | Chikako Idegawa Eibun Senaha Electron electric dipole moment and electroweak baryogenesis in a complex singlet extension of the Standard Model with degenerate scalars Physics Letters B |
| title | Electron electric dipole moment and electroweak baryogenesis in a complex singlet extension of the Standard Model with degenerate scalars |
| title_full | Electron electric dipole moment and electroweak baryogenesis in a complex singlet extension of the Standard Model with degenerate scalars |
| title_fullStr | Electron electric dipole moment and electroweak baryogenesis in a complex singlet extension of the Standard Model with degenerate scalars |
| title_full_unstemmed | Electron electric dipole moment and electroweak baryogenesis in a complex singlet extension of the Standard Model with degenerate scalars |
| title_short | Electron electric dipole moment and electroweak baryogenesis in a complex singlet extension of the Standard Model with degenerate scalars |
| title_sort | electron electric dipole moment and electroweak baryogenesis in a complex singlet extension of the standard model with degenerate scalars |
| url | http://www.sciencedirect.com/science/article/pii/S0370269323006664 |
| work_keys_str_mv | AT chikakoidegawa electronelectricdipolemomentandelectroweakbaryogenesisinacomplexsingletextensionofthestandardmodelwithdegeneratescalars AT eibunsenaha electronelectricdipolemomentandelectroweakbaryogenesisinacomplexsingletextensionofthestandardmodelwithdegeneratescalars |