Effective CP violation in the Standard Model

Abstract

We study the strength of effective CP violation originating from the CKM matrix in the effective action obtained by integrating out the fermions in the Standard Model. Using results obtained by Salcedo for the effective action in a general chiral gauge model, we find that there are no CKM CP-violating terms to fourth order in a gauge-covariant derivative expansion that is non-perturbative in the Higgs field. The details of the calculation suggest that, at zero temperature, the strength of CP violation is approximately independent of the overall scale of the Yukawa couplings. Thus, order of magnitude estimates based on Jarlskog's invariant could be too small by a factor of about 10^{17}.

19 pages, no figures

References in corpus (6)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Chern-Simons production during preheating in hybrid inflation models
• Baryon asymmetry from electroweak tachyonic preheating
• Axial Currents from CKM Matrix CP Violation and Electroweak Baryogenesis
• W and Higgs particle distributions during electroweak tachyonic preheating
• Electroweak-scale inflation, inflaton-Higgs mixing and the scalar spectral index

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• Real-time Fermions for Baryogenesis Simulations
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