Unitarity triangles and geometrical description of CP violation with Majorana neutrinos

@article{AguilarSaavedra2000UnitarityTA,
  title={Unitarity triangles and geometrical description of CP violation with Majorana neutrinos},
  author={J. A. Aguilar-Saavedra and G. Branco},
  journal={Physical Review D},
  year={2000},
  volume={62},
  pages={096009}
}
We generalize the geometrical description of CP violation in the Standard Model in terms of a unitarity triangle. For three left-handed Majorana neutrinos CP violation in the lepton sector is determined by three unitarity triangles. With three additional right-handed neutrinos 15 quadrangles are required to characterize CP violation. We show the relation of the unitarity polygons with physical observables. 

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