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

Mou, Zong-Gang and Saffin, Paul M. and Tranberg, Anders (2018) Simulations of cold electroweak baryogenesis: dependence on the source of CP-violation. Journal of High Energy Physics, 2018 (5). 197/1-197/16. ISSN 1029-8479

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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.

Item Type: Article
Keywords: CP violation; Cosmology of Theories beyond the SM; Lattice Quantum Field Theory; Nonperturbative Effects
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: https://doi.org/10.1007/JHEP05(2018)197
Depositing User: Saffin, Dr Paul
Date Deposited: 14 Jun 2018 10:47
Last Modified: 14 Jun 2018 16:25
URI: http://eprints.nottingham.ac.uk/id/eprint/52402

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