Dirac- and Majorana-neutrino-mass effects in neutrino-electron elastic scattering

Abstract

A covariant formulation is given for the mass-dependent differential cross sections for neutrino (antineutrino)-electron elastic scattering with either Dirac or Majorana neutrinos. It is explained how these cross sections along with a formulation for neutrino oscillations may be used to describe the helicity-transformation effect for neutrinos passing through matter.