Enlarging the window for radiative leptogenesis

G. C. Branco, R. González Felipe*, F. R. Joaquim, B. M. Nobre

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)


We investigate the scenario of resonant thermal leptogenesis, in which the leptonic asymmetries are generated through renormalization group corrections induced at the leptogenesis scale. In the framework of the standard model extended by three heavy Majorana neutrinos with masses M1 = M 2 ≪ M3 at some high scale, we show that the mass splitting and CP-violating effects induced by renormalization group corrections can lead to values of the CP asymmetries large enough for a successful leptogenesis. In this scenario, the low-energy neutrino oscillation data can also be easily accommodated. The possibility of having an underlying symmetry behind the degeneracy in the right-handed neutrino mass spectrum is also discussed.
Original languageEnglish
Pages (from-to)336-344
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number2-3
Publication statusPublished - 9 Feb 2006
Externally publishedYes


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