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

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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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