Weak-basis invariants and CP conservation in the leptonic sector with Majorana neutrinos

Abstract

In this talk, we present a recent investigation of the sufficient and necessary conditions for CP conservation in the leptonic sector with massive Majorana neutrinos in terms of CP-odd weak-basis invariants. The number of weak-basis invariants to guarantee CP conservation in the leptonic sector is clarified and a new set of invariants are advocated for the description of CP conservation, given the physical parameters in their experimentally allowed regions.

6 pages, 1 figure; To appear in the Proceedings of the 40th International Conference on High Energy Physics (ICHEP2020)