Ensemble fermions for electroweak dynamics and the fermion preheating temperature

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.

19 pages, 10 figures

References in corpus (9)

• Magnetic field production during preheating at the electroweak scale
• Real-time dynamics of string breaking
• The Sphaleron Rate through the Electroweak Cross-over
• Low-cost fermions in classical field simulations
• Sizable CP Violation in the Bosonized Standard Model
• Simulations of Cold Electroweak Baryogenesis: Dependence on Higgs mass and strength of CP-violation
• Computing the temperature dependence of effective CP violation in the standard model
• CP violation in the effective action of the Standard Model
• Leading order one-loop CP and P violating effective action in the Standard Model

Cited by in corpus (10)

• The art of simulating the early Universe -- Part I
• Combined Preheating on the lattice with applications to Higgs inflation
• Fermion production from real-time lattice gauge theory in the classical-statistical regime
• Amplified Fermion Production from Overpopulated Bose Fields
• Real-time lattice gauge theory actions: unitarity, convergence, and path integral contour deformations
• Connecting real-time properties of the massless Schwinger model to the massive case
• Simulations of Cold Electroweak Baryogenesis: Dependence on the source of CP-violation
• Cold Baryogenesis from first principles in the Two-Higgs Doublet model with Fermions
• Simulations of "Tunnelling of the 3rd Kind"
• $2+1$ dimensional Floquet systems and lattice fermions: Exact bulk spectral equivalence