PT Journal
AU Barreiros, DM
   Joaquim, FR
   Srivastava, R
   Valle, JWF
TI Minimal scoto-seesaw mechanism with spontaneous CP violation
SO Journal of High Energy Physics
JI J. High Energy Phys.
PY 2021
BP 249 - 21pp
VL 04
IS 4
DI 10.1007/JHEP04(2021)249
LA English
DE Neutrino Physics; CP violation
AB We propose simple scoto-seesaw models to account for dark matter and neutrino masses with spontaneous CP violation. This is achieved with a single horizontal Z8 discrete symmetry, broken to a residual Z2 subgroup responsible for stabilizing dark matter. CP is broken spontaneously via the complex vacuum expectation value of a scalar singlet, inducing leptonic CP-violating effects. We find that the imposed Z8 symmetry pushes the values of the Dirac CP phase and the lightest neutrino mass to ranges already probed by ongoing experiments, so that normal-ordered neutrino masses can be cornered by cosmological observations and neutrinoless double beta decay experiments.
ER