Asymmetric mediator in scotogenic model
The scotogenic model is the Standard Model (SM) with Z2 symmetry and the addition of Z2 odd right-handed Majorana neutrinos and SU(2)L doublet scalar fields. We have extended the original scotogenic model by an additional Z2 odd singlet scalar field that plays a role in dark matter. In our model, th...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-01-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269322007614 |
| _version_ | 1817967839978455040 |
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| author | Kento Asai Yuhei Sakai Joe Sato Yasutaka Takanishi Masato Yamanaka |
| author_facet | Kento Asai Yuhei Sakai Joe Sato Yasutaka Takanishi Masato Yamanaka |
| author_sort | Kento Asai |
| collection | DOAJ |
| description | The scotogenic model is the Standard Model (SM) with Z2 symmetry and the addition of Z2 odd right-handed Majorana neutrinos and SU(2)L doublet scalar fields. We have extended the original scotogenic model by an additional Z2 odd singlet scalar field that plays a role in dark matter. In our model, the asymmetries of the lepton and Z2 odd doublet scalar are simultaneously produced through CP-violating right-handed neutrino decays. While the former is converted into baryon asymmetry through the sphaleron process, the latter is relaid to the DM density through the decay of SU(2)L doublet scalar that is named “asymmetric mediator”. In this way, we provide an extended scotogenic model that predicts the energy densities of baryon and dark matter being in the same order of magnitude, and also explains the low-energy neutrino masses and mixing angles. |
| first_indexed | 2024-04-12T00:46:16Z |
| format | Article |
| id | doaj.art-8dfd345e92c440778d3e21afbbc36c88 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-04-12T00:46:16Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-8dfd345e92c440778d3e21afbbc36c882022-12-22T03:54:52ZengElsevierPhysics Letters B0370-26932023-01-01836137627Asymmetric mediator in scotogenic modelKento Asai0Yuhei Sakai1Joe Sato2Yasutaka Takanishi3Masato Yamanaka4Institute for Cosmic Ray Research (ICRR), The University of Tokyo, Kashiwa, Chiba 277–8582, Japan; Department of Physics, Faculty of Engineering Science, Yokohama National University, Yokohama 240–8501, Japan; Department of Physics, Faculty of Science, Saitama University, Saitama 338–8570, JapanDepartment of Physics, Faculty of Science, Saitama University, Saitama 338–8570, Japan; Corresponding author.Department of Physics, Faculty of Engineering Science, Yokohama National University, Yokohama 240–8501, Japan; Department of Physics, Faculty of Science, Saitama University, Saitama 338–8570, JapanDepartment of Physics, Faculty of Engineering Science, Yokohama National University, Yokohama 240–8501, Japan; Department of Physics, Faculty of Science, Saitama University, Saitama 338–8570, JapanDepartment of Physics, Faculty of Engineering Science, Yokohama National University, Yokohama 240–8501, JapanThe scotogenic model is the Standard Model (SM) with Z2 symmetry and the addition of Z2 odd right-handed Majorana neutrinos and SU(2)L doublet scalar fields. We have extended the original scotogenic model by an additional Z2 odd singlet scalar field that plays a role in dark matter. In our model, the asymmetries of the lepton and Z2 odd doublet scalar are simultaneously produced through CP-violating right-handed neutrino decays. While the former is converted into baryon asymmetry through the sphaleron process, the latter is relaid to the DM density through the decay of SU(2)L doublet scalar that is named “asymmetric mediator”. In this way, we provide an extended scotogenic model that predicts the energy densities of baryon and dark matter being in the same order of magnitude, and also explains the low-energy neutrino masses and mixing angles.http://www.sciencedirect.com/science/article/pii/S0370269322007614 |
| spellingShingle | Kento Asai Yuhei Sakai Joe Sato Yasutaka Takanishi Masato Yamanaka Asymmetric mediator in scotogenic model Physics Letters B |
| title | Asymmetric mediator in scotogenic model |
| title_full | Asymmetric mediator in scotogenic model |
| title_fullStr | Asymmetric mediator in scotogenic model |
| title_full_unstemmed | Asymmetric mediator in scotogenic model |
| title_short | Asymmetric mediator in scotogenic model |
| title_sort | asymmetric mediator in scotogenic model |
| url | http://www.sciencedirect.com/science/article/pii/S0370269322007614 |
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