Simulations of Cold Electroweak Baryogenesis: hypercharge U(1) and the creation of helical magnetic fields
We perform numerical simulations of Cold Electroweak Baryogenesis, including for the first time in the Bosonic sector the full electroweak gauge group SU(2)×U(1) and CP-violation. We find that the maximum generated baryon asymmetry is reduced by a factor of three relative to the SU(2)-only model, bu...
| Main Authors: | , , |
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| Format: | Article |
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Springer Verlag
2017
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| Online Access: | https://eprints.nottingham.ac.uk/43972/ |
| _version_ | 1848796808615034880 |
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| author | Mou, Zong-Gang Saffin, Paul M. Tranberg, Anders |
| author_facet | Mou, Zong-Gang Saffin, Paul M. Tranberg, Anders |
| author_sort | Mou, Zong-Gang |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | We perform numerical simulations of Cold Electroweak Baryogenesis, including for the first time in the Bosonic sector the full electroweak gauge group SU(2)×U(1) and CP-violation. We find that the maximum generated baryon asymmetry is reduced by a factor of three relative to the SU(2)-only model, but that the quench time dependence is very similar. In addition, we compute the magnitude of the helical magnetic fields, and find that it is proportional to the strength of CP-violation and dependent on quench time, but is not proportional to the magnitude of the baryon asymmetry as proposed in the literature. Astrophysical signatures of primordial magnetic helicity can therefore not in general be used as evidence that electroweak baryogenesis has taken place. |
| first_indexed | 2025-11-14T19:53:52Z |
| format | Article |
| id | nottingham-43972 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:53:52Z |
| publishDate | 2017 |
| publisher | Springer Verlag |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-439722020-05-04T18:50:25Z https://eprints.nottingham.ac.uk/43972/ Simulations of Cold Electroweak Baryogenesis: hypercharge U(1) and the creation of helical magnetic fields Mou, Zong-Gang Saffin, Paul M. Tranberg, Anders We perform numerical simulations of Cold Electroweak Baryogenesis, including for the first time in the Bosonic sector the full electroweak gauge group SU(2)×U(1) and CP-violation. We find that the maximum generated baryon asymmetry is reduced by a factor of three relative to the SU(2)-only model, but that the quench time dependence is very similar. In addition, we compute the magnitude of the helical magnetic fields, and find that it is proportional to the strength of CP-violation and dependent on quench time, but is not proportional to the magnitude of the baryon asymmetry as proposed in the literature. Astrophysical signatures of primordial magnetic helicity can therefore not in general be used as evidence that electroweak baryogenesis has taken place. Springer Verlag 2017-06-14 Article PeerReviewed Mou, Zong-Gang, Saffin, Paul M. and Tranberg, Anders (2017) Simulations of Cold Electroweak Baryogenesis: hypercharge U(1) and the creation of helical magnetic fields. Journal of High Energy Physics, 2017 (6). pp. 1-27. ISSN 1029-8479 https://link.springer.com/article/10.1007%2FJHEP06%282017%29075 doi:10.1007/JHEP06(2017)075 doi:10.1007/JHEP06(2017)075 |
| spellingShingle | Mou, Zong-Gang Saffin, Paul M. Tranberg, Anders Simulations of Cold Electroweak Baryogenesis: hypercharge U(1) and the creation of helical magnetic fields |
| title | Simulations of Cold Electroweak Baryogenesis: hypercharge U(1) and the creation of helical magnetic fields |
| title_full | Simulations of Cold Electroweak Baryogenesis: hypercharge U(1) and the creation of helical magnetic fields |
| title_fullStr | Simulations of Cold Electroweak Baryogenesis: hypercharge U(1) and the creation of helical magnetic fields |
| title_full_unstemmed | Simulations of Cold Electroweak Baryogenesis: hypercharge U(1) and the creation of helical magnetic fields |
| title_short | Simulations of Cold Electroweak Baryogenesis: hypercharge U(1) and the creation of helical magnetic fields |
| title_sort | simulations of cold electroweak baryogenesis: hypercharge u(1) and the creation of helical magnetic fields |
| url | https://eprints.nottingham.ac.uk/43972/ https://eprints.nottingham.ac.uk/43972/ https://eprints.nottingham.ac.uk/43972/ |