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

Journal of High Energy Physics volume 2018, Article number: 197 (2018) Cite this article

A preprint version of the article is available at arXiv.

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.

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This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Authors and Affiliations

  1. School of Physics and Astronomy, University Park, University of Nottingham, Nottingham, NG7 2RD, U.K.

    Paul M. Saffin

  2. Faculty of Science and Technology, University of Stavanger, 4036, Stavanger, Norway

    Zong-Gang Mou & Anders Tranberg

Authors
  1. Zong-Gang Mou
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  2. Paul M. Saffin
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  3. Anders Tranberg
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Correspondence to Zong-Gang Mou.

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ArXiv ePrint: 1803.07346

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Mou, ZG., Saffin, P.M. & Tranberg, A. Simulations of cold electroweak baryogenesis: dependence on the source of CP-violation. J. High Energ. Phys. 2018, 197 (2018). https://doi.org/10.1007/JHEP05(2018)197

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  • DOI: https://doi.org/10.1007/JHEP05(2018)197

Keywords

  • CP violation
  • Cosmology of Theories beyond the SM
  • Lattice Quantum Field Theory
  • Nonperturbative Effects