PT Journal
AU Fernandez-Martinez, E
   Lopez-Pavon, J
   Ota, T
   Rosauro-Alcaraz, S
TI nu electroweak baryogenesis
SO Journal of High Energy Physics
JI J. High Energy Phys.
PY 2020
BP 063
EP 28pp
VL 10
IS 10
DI 10.1007/JHEP10(2020)063
LA English
DE Beyond Standard Model; Cosmology of Theories beyond the SM; CP viola- tion; Neutrino Physics
AB We investigate if the CP violation necessary for successful electroweak baryo- genesis may be sourced by the neutrino Yukawa couplings. In particular, we consider an electroweak scale Seesaw realization with sizable Yukawas where the new neutrino singlets form (pseudo)-Dirac pairs, as in the linear or inverse Seesaw variants. We find that the baryon asymmetry obtained strongly depends on how the neutrino masses vary within the bubble walls. Moreover, we also find that flavour effects critically impact the final asymmetry obtained and that, taking them into account, the observed value may be obtained in some regions of the parameter space. This source of CP violation naturally avoids the strong constraints from electric dipole moments and links the origin of the baryon asymmetry of the Universe with the mechanism underlying neutrino masses. Interestingly, the mixing of the active and heavy neutrinos needs to be sizable and could be probed at the LHC or future collider experiments.
ER