Testable neutrino mass and TeV-scale leptogenesis in a $D_4$ inverse seesaw model

An inverse seesaw model for neutrino masses and mixing is proposed, based on the spontaneous breaking of a $D_4$ flavor symmetry. The model simultaneously accounts for the observed neutrino oscillation pattern, the baryon asymmetry of the Universe through TeV-scale leptogenesis, and potentially observable charged-lepton flavor violating (cLFV) processes. A phenomenological analysis shows that the model is consistent with current neutrino oscillation data for both normal and inverted mass orderings. Successful leptogenesis is realized for lightest pseudo-Dirac neutrino masses at the multi-TeV scale. The predicted cLFV branching ratios lie well below the current experimental upper limits while remaining within the sensitivity reach of next-generation experiments. These results establish the model as a viable and testable framework that links low-energy neutrino observables to TeV-scale leptogenesis and cLFV phenomenology.