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Article overview
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Exotic see-saw mechanism for neutrini and leptogenesis in a Pati-Salam model | | Andrea Addazi
; Massimo Bianchi
; Giulia Ricciardi
; | | Date: |
1 Oct 2015 | | Abstract: | We discuss non-perturbative corrections to the neutrino sector, in the
context of a D-brane Pati-Salam-like model, that can be obtained as a simple
alternative to $SO(10)$ GUT’s in theories with open and unoriented strings. In
such D-brane models, exotic stringy instantons can correct the right-handed
neutrino mass matrix in a calculable way, thus affecting mass hierarchies and
modifying the see-saw mechanism to what we name exotic see-saw. For a wide
range of parameters, a compact spectrum of right-handed neutrino masses can
occur that gives rise to a predictive scenario for low energy observables. This
model also provides a viable mechanism for Baryon Asymmetry in the Universe
(BAU) through leptogenesis. Finally, a Majorana mass for the neutron is
naturally predicted in the model, leading to potentially testable
neutron-antineutron oscillations. Combined measurements in neutrino and
neutron-antineutron sectors could provide precious informations on physics at
the quantum gravity scale. | | Source: | arXiv, 1510.0243 | | Services: | Forum | Review | PDF | Favorites | |
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