Enhanced neutrino polarizability

A bstract We point out that neutrinos can have enhanced couplings to photons, if light (pseudo)scalar mediators are present, resulting in a potentially measurable neutrino polarizability. show the expected suppression from small masses be compensated by mediator mass, generating dimension 7 Rayleigh operators at low scales. explore rich phenomenology of such models, computing detail constraints on viable parameter space, spanned and photons. Finally, we build several explicit models lead an polarizability modifying inverse see-saw majoron, i.e., pseudo-Nambu-Goldstone boson U(1) L global lepton number responsible for masses.