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Neutrino-Antineutrino Asymmetry around Rotating Black Holes

Banibrata Mukhopadhyay·Parampreet Singh
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Abstract

Propagation of fermion in curved space-time generates 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 CPT violating term in the Lagrangian. It is seen that this space-time interaction can generate neutrino asymmetry in Universe. If the back-ground metric is spherically asymmetric, say, of a rotating black hole, this interaction is non-zero, thus the net difference to the number density of the neutrino and anti-neutrino is nonzero.

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Banibrata Mukhopadhyay, Parampreet Singh. 2003-03-12. Neutrino-Antineutrino Asymmetry around Rotating Black Holes. https://doi.org/10.1007/bf02705368

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