A new, direct link between the baryon asymmetry and neutrino masses
arXiv:0804.0801 · doi:10.1016/j.nuclphysb.2008.07.015
Abstract
We point out that, in a class of SO(10) models with matter fields in 16 and 10 representations and type II realization of the seesaw mechanism, the light neutrino masses and the CP asymmetry needed for leptogenesis are controlled by one and the same set of couplings. The generated baryon asymmetry then directly depends on the low-energy neutrino parameters, with no unknown seesaw-scale flavour parameters involved; in particular, the necessary CP violation is provided by the CP-violating phases of the lepton mixing matrix. We compute the CP asymmetry in triplet decays for this scenario and show that it can lead to successful leptogenesis.
21 pages, 2 figures. v2: footnote and numerical exemple added in Section 4, comment added in the conclusions; typos corrected, references added
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Cited by in corpus (7)
- Leptogenesis in the Universe
- Successful Leptogenesis in SO(10) Unification with a Left-Right Symmetric Seesaw Mechanism
- Type II see-saw dominance in SO(10)
- Yukawa coupling unification in SO(10) with positive μ and a heavier gluino
- Flavour structure of supersymmetric SO(10) GUTs with extended matter sector
- Experimental and Theoretical Evidence for Extended Particle Models
- Flavour always matters in scalar triplet leptogenesis