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Ensemble fermions for electroweak dynamics and the fermion preheating temperature

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

Authors

Zong-Gang Mou

Anders Tranberg

Paul M. Saffin

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.

Journal Article Type Article
Publication Date Nov 12, 2013
Journal Journal of High Energy Physics
Electronic ISSN 1029-8479
Publisher Humana Press
Peer Reviewed Peer Reviewed
Volume 2013
Issue 11
Institution Citation 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), doi:10.1007/JHEP11(2013)097
DOI https://doi.org/10.1007/JHEP11%282013%29097
Keywords Anomalies, Fermions, Numerical simulations, Baryogenesis
Publisher URL http://link.springer.com/article/10.1007%2FJHEP11%282013%29097
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf




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