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Simulations of Cold Electroweak Baryogenesis: hypercharge U(1) and the creation of helical magnetic fields

Mou, Zong-Gang; Saffin, Paul M.; Tranberg, Anders

Authors

Zong-Gang Mou

PAUL SAFFIN PAUL.SAFFIN@NOTTINGHAM.AC.UK
Professor of Physics

Anders Tranberg



Abstract

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.

Citation

Mou, Z., Saffin, P. M., & Tranberg, A. (2017). Simulations of Cold Electroweak Baryogenesis: hypercharge U(1) and the creation of helical magnetic fields. Journal of High Energy Physics, 2017(6), https://doi.org/10.1007/JHEP06%282017%29075

Journal Article Type Article
Acceptance Date Jun 1, 2017
Publication Date Jun 14, 2017
Deposit Date Jul 5, 2017
Publicly Available Date Mar 28, 2024
Journal Journal of High Energy Physics
Electronic ISSN 1029-8479
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 2017
Issue 6
DOI https://doi.org/10.1007/JHEP06%282017%29075
Public URL https://nottingham-repository.worktribe.com/output/866351
Publisher URL https://link.springer.com/article/10.1007%2FJHEP06%282017%29075

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