Mass generation in the aether: Neutrino oscillations and massive gauge fields

► Dirac neutrinos and gauge fields couple by permeability tensors to the aether. ► Effective neutrino and gauge masses are generated by permeability tensors. ► Oscillating flavor transition probabilities are due to effective mass-squares. ► The propagators of Dirac and gauge fields in a dispersive spacetime are derived. ► Gauge invariance is preserved by the effective mass in the propagators.