2009/09/15 by Emiliano Molinaro, Molinaro, E., S.T. Petcov +1
Biochemistry, Genetics and Molecular Biology · #FOS: Physical sciences #Fractal and DNA sequence analysis #High Energy Physics - Phenomenology (hep-ph)
paper · pdf · doi:10.48550/arxiv.0909.2836
openalex publication_date 2009/09/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The CP-violation necessary for the generation of the baryon asymmetry of the Universe in the "flavoured" leptogenesis scenario can arise from the "low energy" PMNS neutrino mixing matrix and/or from the "high energy" part of neutrino Yukawa couplings, which can mediate CP-violating phenomena only at some high energy scale. The possible interplay between these two types of CP-violation is discussed. The type I see-saw model with three heavy right-handed Majorana neutrinos having hierarchical spectrum is considered. The analysis shows that there exist regions in the leptogenesis parameter space where the relevant "high energy" phases have large CP-violating values, but the purely "high energy" contribution to the baryon asymmetry plays a subdominant/suppressed role in the production of baryon asymmetry compatible with the observations and one can have successful leptogenesis if the requisite CP-violation is provided by the Majorana phase(s) in the neutrino mixing matrix.