Dark matter for Majorana neutrinos in a ${\mathbb{Z}}_4$ symmetry

Leon M. G. de la Vega, Patrick J. Fitzpatrick, Rolando Martinez-Ramirez +1

In the minimal Scotogenic model with fermionic dark matter, the neutrino Yukawa matrix is fine-tuned to satisfy current bounds on $\mu \to e\gamma$ while producing dark matter thr…