TY  - JOUR
AU  - Aristizabal Sierra, D.
AU  - Bazzocchi, F.
AU  - de Medeiros Varzielas, I.
AU  - Merlo, L.
AU  - Morisi, S.
PY  - 2010
DA  - 2010//
TI  - Tri/Bi-maximal lepton mixing and leptogenesis
T2  - Nucl. Phys. B
JO  - Nuclear Physics B
SP  - 34
EP  - 58
VL  - 827
IS  - 1-2
PB  - Elsevier Science Bv
AB  - In models with flavour symmetries added to the gauge group of the Standard Model the CP-violating asymmetry necessary for leptogenesis may be related with low-energy parameters. A particular case of interest is when the flavour symmetry produces exact Tri/Bi-maximal lepton mixing leading to a vanishing CP-violating asymmetry. In this paper we present a model-independent discussion that confirms this always occurs for unflavoured leptogenesis in type I see-saw scenarios, noting however that Tri/Bi-maximal mixing does not imply a vanishing asymmetry in general scenarios where there is interplay between type I and other see-saws. We also consider a specific model where the exact Tri/Bi-maximal mixing is lifted by corrections that can be parametrised by a small number of degrees of freedom and analyse in detail the existing link between low and high-energy parameters – focusing on how the deviations from Tri/Bi-maximal are connected to the parameters governing leptogenesis.
SN  - 0550-3213
UR  - http://arxiv.org/abs/0908.0907
UR  - https://doi.org/10.1016/j.nuclphysb.2009.10.009
DO  - 10.1016/j.nuclphysb.2009.10.009
LA  - English
N1  - ISI:000272669900002
ID  - AristizabalSierra_etal2010
ER  -