Simulations of Cold Electroweak Baryogenesis: finding the optimal quench time

  • Zong-Gang MouEmail author
  • Paul M. Saffin
  • Anders Tranberg
Open Access
Regular Article - Theoretical Physics


We revisit the numerical computation of the baryon asymmetry from Cold Electroweak Baryogenesis given the physical Higgs mass. We investigate the dependence of the asymmetry on the speed at which electroweak symmetry breaking takes place. The maximum asymmetry does not occur for arbitrarily fast quenches, but at quench times of about τ q  ≃ 16m H − 1 , with no asymmetry created for quenches slower than τ q  > 30m H − 1 . Curiously, we also find that the overall sign of the asymmetry depends on the quench time.


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


Open Access

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Copyright information

© The Author(s) 2017

Authors and Affiliations

  • Zong-Gang Mou
    • 2
    Email author
  • Paul M. Saffin
    • 1
  • Anders Tranberg
    • 2
  1. 1.School of Physics and AstronomyUniversity of NottinghamNottinghamU.K.
  2. 2.Faculty of Science and TechnologyUniversity of StavangerStavangerNorway

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