title: Can gravity distinguish between Dirac and Majorana neutrinos?
abstract: We show that spin-gravity interaction can distinguish between Dirac and Majorana neutrino wave packets propagating in a Lense-Thirring background. Using time-independent perturbation theory and the gravitational phase to generate a perturbation Hamiltonian with spin-gravity coupling, we show that the associated matrix element for the Majorana neutrino differs significantly from its Dirac counterpart. This difference can be demonstrated through significant gravitational corrections to the neutrino oscillation length for a two-flavor system, as shown explicitly for SN 1987A.
authors.affiliation: Department of Physics, University of Regina, Regina, Saskatchewan, S4S 0A2, Canada. singhd@uregina.ca
authors.forename: Dinesh
authors.initials: D
authors.lastname: Singh
authors.forename: Nader
authors.initials: N
authors.lastname: Mobed
authors.forename: Giorgio
authors.initials: G
authors.lastname: Papini