Ensemble fermions for electroweak dynamics and the fermion preheating temperature

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

Abstract

We refine the implementation of ensemble fermions for the electroweak sector of the Standard Model, introduced previously. We consider the behavior of different observables as the size of the ensemble is increased and show that the dynamics converges for ensemble sizes small enough that simulations of the entire electroweak sector become numerically tractable. We apply the method to the computation of the effective preheating temperature during a fast electroweak transition, relevant for Cold Electroweak Baryogenesis. We find that this temperature is never below 20 GeV, and this in combination with the early results convincingly rules out Standard Model CP-violation as the origin of the baryon asymmetry of the Universe.

Citation

Mou, Z.-G., Tranberg, A., & Saffin, P. M. (2013). Ensemble fermions for electroweak dynamics and the fermion preheating temperature. Journal of High Energy Physics, 2013(11), https://doi.org/10.1007/JHEP11%282013%29097

• Journal Article Type: Article
• Acceptance Date: Oct 22, 2013
• Publication Date: Nov 12, 2013
• Deposit Date: Apr 24, 2017
• Publicly Available Date: Apr 24, 2017
• Journal: Journal of High Energy Physics
• Electronic ISSN: 1029-8479
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 2013
• Issue: 11
• DOI: https://doi.org/10.1007/JHEP11%282013%29097
• Keywords: Anomalies, Fermions, Numerical simulations, Baryogenesis
• Public URL: https://nottingham-repository.worktribe.com/output/719528
• Publisher URL: http://link.springer.com/article/10.1007%2FJHEP11%282013%29097
• Contract Date: Apr 24, 2017