Can Gravity Distinguish Between Dirac and Majorana Neutrinos?

Details Can Gravity Distinguish Between Dirac and Majorana Neutrinos? Can Gravity Distinguish Between Dirac and Majorana Neutrinos?

2006-05-31

arxiv.org/abs/gr-qc/0605153v3

Phys.Rev.Lett. 97 (2006) 041101

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, 2 figures; minor changes of text; typo corrected; accepted in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.97.041101

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 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-flavour system, as shown explicitly for SN1987A.

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