2008/10/31 by Andrés Hernández, Andres Hernandez, Thomas Konstandin +1 · 1 citation
Physics and Astronomy · #Action (physics) #Black Holes and Theoretical Physics #CP violation #Economics #Effective action #Gauge (firearms) #Mathematical physics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Standard Model (mathematical formulation) #Theoretical physics #Yukawa potential #astro-ph #hep-ph #hep-th
paper · pdf · doi:10.1016/j.nuclphysb.2008.12.021
15 pages, minor changes, published version
openalex publication_date 2008/12/31 · arxiv created 2009/01/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Using the worldline method, we derive an effective action of the bosonic sector of the Standard Model by integrating out the fermionic degrees of freedom. The CP violation stemming from the complex phase in the CKM matrix gives rise to CP-violating operators in the one-loop effective action in the next-to-leading order of a gradient expansion. We calculate the prefactor of the appropriate operators and give general estimates of CP violation in the bosonic sector of the Standard Model. In particular, we show that the effective CP violation for weak gauge fields is not suppressed by the Yukawa couplings of the light quarks and is much larger than the bound given by the Jarlskog determinant.