A new model for neutrino-gravitational fields

Abstract

It is shown that a spinor-connection theory, with the action of both left- and right-operating connection groups, can admit neutrino fields despite the presence of a non-zero mass-term in the Dirac-type equation of the theory. Provided the radius of the neutrino is small in comparison with the Compton radius associated with the mass term, the spinor field exhibits an intrinsic spin of one-half. The field propagates at the fundamental velocity, with zero mass in the rest frame but with positive energy-density and finite mass in the laboratory frame.