Encounter with the Puzzle of Inert Neutrinos Once Again

Abstract

From neutrino mixing experiments at LNSD and Mini-Boone, there are indications for the existence of inert neutrinos having no weak couplings. The problem of inert neutrinos is very interesting also from TGD point of view. TGD predicts right handed neutrino with no electroweak couplings but mixes with left handed neutrino by a new interaction produced by the mixing of M⁴ and CP₂ gamma matrices: This is a unique feature of induced spinor structure and serves as a signature of sub-manifold geometry and one signature distinguishing TGD from standard model. Only massive neutrino with both helicities remains and behaves in good approximation as a left handed neutrino.