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In this PhD thesis, we first look at some manifestations of CP violation,such as electric dipole moments (EDMs) of elementary particles, both in theweak sector in the presence of neutrino masses (absent in the SM) as well as inthe strong sector. Then, in a second study, we build an effective field theoryfor gauge bosons. We generalize the Euler-Heisenberg Lagrangian for the studyof photon interactions, considered as the archetype of an effective fieldtheory; to gauge bosons of arbitrary Lie algebras, several Grand Unificationgroups and some mixed symmetries.

Some aspects of CP violation and gauge interactions in the standard model and beyond