Leptogenesis in an S3 model

18th International Symposium on Particles Strings and Cosmology

Cruz, Arturo Álvarez^1 ; Mondragon, Myriam^1

Instituto de Física, Universidad Nacional Autónoma de México, Apdo. Postal 20-360, 04515 México D.F., Mexico^1

关键词: Baryogenesis;    Leptogenesis;    Majorana phasis;    Neutrino mass;    Right-handed neutrinos;    The standard model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/485/1/012040/pdf
DOI  :  10.1088/1742-6596/485/1/012040

来源: IOP

【 摘 要 】

We study the possibility of having leptogenesis in an S3extension of the Standard Model with three Higgs doublets and three right-handed neutrinos. In the leptonic sector we introduce also a Z2symmetry to reduce further the number of parameters. The characteristics of the model allow in a very natural way for resonant leptogenesis, which is highly dependent on the values of the Dirac and Majorana phases. The associated baryogenesis is also maximal when the neutrino masses are almost degenerate.