Ensemble fermions for electroweak dynamics and the fermion preheating temperature

Mou, Zong-Gang and Saffin, Paul M. and Tranberg, Anders (2013) Ensemble fermions for electroweak dynamics and the fermion preheating temperature. Journal of High Energy Physics, 2013 (11). ISSN 1029-8479

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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.

Item Type: Article
Keywords: Anomalies, Fermions, Numerical simulations, Baryogenesis
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: 10.1007/JHEP11(2013)097
Depositing User: Saffin, Dr Paul
Date Deposited: 24 Apr 2017 13:11
Last Modified: 13 Oct 2017 01:01
URI: http://eprints.nottingham.ac.uk/id/eprint/42151

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