Skip to main content

Research Repository

Advanced Search

Ensemble fermions for electroweak dynamics and the fermion preheating temperature

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


Zong-Gang Mou

Anders Tranberg


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.


Mou, Z., Tranberg, A., & Saffin, P. M. (2013). Ensemble fermions for electroweak dynamics and the fermion preheating temperature. Journal of High Energy Physics, 2013(11),

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
Keywords Anomalies, Fermions, Numerical simulations, Baryogenesis
Public URL
Publisher URL


You might also like

Downloadable Citations