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?

2012-01-23

arxiv.org/abs/1201.4741v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 18 diagrams

Scientific paper

The interaction of neutrinos with gravitational fields in the weak field regime at 1-loop to leading order has been studied in Ref[2]. They deduce some theoretical differences between the Majorana and Dirac neutrinos. Then they prove that in spite of the theoretical differences between the two cases, as far as experiments are considered, they would be virtually indistinguishable. We study the interaction of neutrinos with weak gravitational fields to the second order (at 2-loops). After heavy calculations we show that there appear new neutrino gravitational form factors which were absent in the first order calculations, so from theoretical point of view there are more differences between the two kind of neutrinos than the first order but surprisingly we show that like the first order they are indistinguishable experimentally.

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