Electroweak baryogenesis between broken phases in multi-step phase transition
Possibility of electroweak baryogenesis (EWBG) via multi-step phase transition (PT) is considered. We investigate the EWBG between SU(2) broken phases in the second step PT of the two-step PT. The produced baryon number asymmetry is evaluated using a prototypical model with a SU(2) charged CP-odd sc...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-08-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269323003751 |
| _version_ | 1827897281461878784 |
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| author | Mayumi Aoki Hiroto Shibuya |
| author_facet | Mayumi Aoki Hiroto Shibuya |
| author_sort | Mayumi Aoki |
| collection | DOAJ |
| description | Possibility of electroweak baryogenesis (EWBG) via multi-step phase transition (PT) is considered. We investigate the EWBG between SU(2) broken phases in the second step PT of the two-step PT. The produced baryon number asymmetry is evaluated using a prototypical model with a SU(2) charged CP-odd scalar field. We show that the second step PTs where the sphaleron rate is possible to be un-suppressed before the PTs, which can reproduce the sufficient baryon number asymmetry. Our studies can be adapted to models with extra SU(2) scalar fields. We discuss specific models suitable for our scenario. |
| first_indexed | 2024-03-12T22:46:55Z |
| format | Article |
| id | doaj.art-23e55ab7e72847c585b1a8303338a7b2 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-03-12T22:46:55Z |
| publishDate | 2023-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-23e55ab7e72847c585b1a8303338a7b22023-07-21T04:58:25ZengElsevierPhysics Letters B0370-26932023-08-01843138041Electroweak baryogenesis between broken phases in multi-step phase transitionMayumi Aoki0Hiroto Shibuya1Institute for Theoretical Physics, Kanazawa University, Kanazawa 920-1192, JapanCorresponding author.; Institute for Theoretical Physics, Kanazawa University, Kanazawa 920-1192, JapanPossibility of electroweak baryogenesis (EWBG) via multi-step phase transition (PT) is considered. We investigate the EWBG between SU(2) broken phases in the second step PT of the two-step PT. The produced baryon number asymmetry is evaluated using a prototypical model with a SU(2) charged CP-odd scalar field. We show that the second step PTs where the sphaleron rate is possible to be un-suppressed before the PTs, which can reproduce the sufficient baryon number asymmetry. Our studies can be adapted to models with extra SU(2) scalar fields. We discuss specific models suitable for our scenario.http://www.sciencedirect.com/science/article/pii/S0370269323003751 |
| spellingShingle | Mayumi Aoki Hiroto Shibuya Electroweak baryogenesis between broken phases in multi-step phase transition Physics Letters B |
| title | Electroweak baryogenesis between broken phases in multi-step phase transition |
| title_full | Electroweak baryogenesis between broken phases in multi-step phase transition |
| title_fullStr | Electroweak baryogenesis between broken phases in multi-step phase transition |
| title_full_unstemmed | Electroweak baryogenesis between broken phases in multi-step phase transition |
| title_short | Electroweak baryogenesis between broken phases in multi-step phase transition |
| title_sort | electroweak baryogenesis between broken phases in multi step phase transition |
| url | http://www.sciencedirect.com/science/article/pii/S0370269323003751 |
| work_keys_str_mv | AT mayumiaoki electroweakbaryogenesisbetweenbrokenphasesinmultistepphasetransition AT hirotoshibuya electroweakbaryogenesisbetweenbrokenphasesinmultistepphasetransition |