Towards Reviving Electroweak Baryogenesis with a Fourth Generation
Electroweak baryogenesis is an attractive scenario for explaining the baryon asymmetry of the universe. However, it does not work within the standard model due to two reasons: (1) the strength of CP violation from the Kobayashi-Maskawa mechanism with three generations is too small; (2) the electrowe...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2013/769240 |
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| _version_ | 1849308631368990720 |
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| author | Wei-Shu Hou Masaya Kohda |
| author_facet | Wei-Shu Hou Masaya Kohda |
| author_sort | Wei-Shu Hou |
| collection | DOAJ |
| description | Electroweak baryogenesis is an attractive scenario for explaining the baryon asymmetry of the
universe. However, it does not work within the standard model due to two reasons: (1) the strength of CP violation from the Kobayashi-Maskawa mechanism with three generations is too small; (2) the electroweak phase transition is not first order for the experimentally allowed Higgs boson mass. We discuss possibilities to solve these problems by introducing a fourth generation of fermions and how electroweak baryogenesis might be revived. We also discuss briefly the recent observation of a Higgs-like boson with mass around 125 GeV, which puts the fourth generation in a difficult situation, and the possible way out. |
| format | Article |
| id | doaj-art-0dbaa59cf8a34325b9e6e5cb5261d69c |
| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in High Energy Physics |
| spelling | doaj-art-0dbaa59cf8a34325b9e6e5cb5261d69c2025-08-20T03:54:24ZengWileyAdvances in High Energy Physics1687-73571687-73652013-01-01201310.1155/2013/769240769240Towards Reviving Electroweak Baryogenesis with a Fourth GenerationWei-Shu Hou0Masaya Kohda1Department of Physics, National Taiwan University, Taipei 10617, TaiwanDepartment of Physics, National Taiwan University, Taipei 10617, TaiwanElectroweak baryogenesis is an attractive scenario for explaining the baryon asymmetry of the universe. However, it does not work within the standard model due to two reasons: (1) the strength of CP violation from the Kobayashi-Maskawa mechanism with three generations is too small; (2) the electroweak phase transition is not first order for the experimentally allowed Higgs boson mass. We discuss possibilities to solve these problems by introducing a fourth generation of fermions and how electroweak baryogenesis might be revived. We also discuss briefly the recent observation of a Higgs-like boson with mass around 125 GeV, which puts the fourth generation in a difficult situation, and the possible way out.http://dx.doi.org/10.1155/2013/769240 |
| spellingShingle | Wei-Shu Hou Masaya Kohda Towards Reviving Electroweak Baryogenesis with a Fourth Generation Advances in High Energy Physics |
| title | Towards Reviving Electroweak Baryogenesis with a Fourth Generation |
| title_full | Towards Reviving Electroweak Baryogenesis with a Fourth Generation |
| title_fullStr | Towards Reviving Electroweak Baryogenesis with a Fourth Generation |
| title_full_unstemmed | Towards Reviving Electroweak Baryogenesis with a Fourth Generation |
| title_short | Towards Reviving Electroweak Baryogenesis with a Fourth Generation |
| title_sort | towards reviving electroweak baryogenesis with a fourth generation |
| url | http://dx.doi.org/10.1155/2013/769240 |
| work_keys_str_mv | AT weishuhou towardsrevivingelectroweakbaryogenesiswithafourthgeneration AT masayakohda towardsrevivingelectroweakbaryogenesiswithafourthgeneration |