Neutrino asymmetry in presence of gravitational interaction

Details Neutrino asymmetry in presence of gravitational interaction Neutrino asymmetry in presence of gravitational interaction

2004-01-22

arxiv.org/abs/gr-qc/0401095v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

3 latex pages; to appear in the proceedings of X Marcel Grossmann Meeting, Rio de Janeiro, 20-26 July 2003; on the basis of ta

Scientific paper

Propagation of fermions in curved space-time generates a gravitational interaction due to the coupling between spin of the fermion and space-time curvature. This gravitational interaction, which is an axial-vector appears as the CPT violating term in the Lagrangian, can generate the neutrino asymmetry in Universe. If the back-ground metric is spherically asymmetric, say, of rotating black hole, the axisymmetric space-time of an expanding Universe, this interaction as well as the neutrino asymmetry is non-zero.

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