Simulations of cold electroweak baryogenesis: dependence on the source of CP-violation

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

Abstract

We compute the baryon asymmetry created in a tachyonic electroweak symmetry breaking transition, focusing on the dependence on the source of effective CP-violation. Earlier simulations of Cold Electroweak Baryogenesis have almost exclusively considered a very specific CP-violating term explicitly biasing Chern-Simons number. We compare four different dimension six, scalar-gauge CP-violating terms, involving both the Higgs field and another dynamical scalar coupled to SU(2) or U(1) gauge fields. We find that for sensible values of parameters, all implementations can generate a baryon asymmetry consistent with observations, showing that baryogenesis is a generic outcome of a fast tachyonic electroweak transition.

Citation

Mou, Z., Saffin, P. M., & Tranberg, A. (2018). Simulations of cold electroweak baryogenesis: dependence on the source of CP-violation. Journal of High Energy Physics, 2018(5), Article 197. https://doi.org/10.1007/JHEP05%282018%29197

• Journal Article Type: Article
• Acceptance Date: May 26, 2018
• Publication Date: May 30, 2018
• Deposit Date: Jun 14, 2018
• Publicly Available Date: Jun 14, 2018
• Journal: Journal of High Energy Physics
• Electronic ISSN: 1029-8479
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 2018
• Issue: 5
• Article Number: 197
• DOI: https://doi.org/10.1007/JHEP05%282018%29197
• Keywords: CP violation; Cosmology of Theories beyond the SM; Lattice Quantum Field Theory; Nonperturbative Effects
• Public URL: https://nottingham-repository.worktribe.com/output/934685
• Publisher URL: https://link.springer.com/article/10.1007%2FJHEP05%282018%29197