Speaker
Description
We investigate the phenomenology of a minimally extended scotogenic model motivated by the observed active neutrino masses, viable dark matter (DM) candidates, and the high-energy behavior of the Standard Model (SM) quartic coupling constant. The neutrino mass generation mechanism is briefly reviewed, covering both normal and inverted mass hierarchies, along with a concise discussion of DM candidates and the associated experimental constraints. Since the model incorporates an extended SM scalar potential, we examine the bounded-from-below conditions, vacuum stability, and renormalization group (RG)-driven perturbativity bounds arising from the extended scalar sector. We further analyze a comprehensive set of flavor observables, including the anomalous magnetic moment of the muon in light of the recent experimental tension of $\Delta a_{\mu}$, the radiative decays $\ell_{\alpha} \rightarrow \ell_{\beta} \gamma$ and $\ell_{\alpha} \rightarrow 3\ell_{\beta}$, the $\mu \rightarrow e$ conversion rate, and electroweak (EW) precision observables, including the oblique parameters and the leptonic decays of the $Z$ and $H$. A numerical scan reveals three notable features: first, the viable fermionic DM candidate mass lies in the range $120-300 \operatorname{GeV}$, while the CP-odd scalar mass is constrained to $300-600 \operatorname{GeV}$; second, the oblique parameters are projected to be within the reach of future precision measurements; and third, the $Z \rightarrow \operatorname{Invisible}$ decay can provide a probe of the Majorana nature of the light active neutrinos.