Neutrino-Antineutrino Asymmetry around Rotating Black Holes

Details Neutrino-Antineutrino Asymmetry around Rotating Black Holes Neutrino-Antineutrino Asymmetry around Rotating Black Holes

2003-03-12

arxiv.org/abs/gr-qc/0303053v1

Pramana62:775-778,2004

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

3 pages, pramana style; to appear in a special issue of Pramana -- J. Phys., as proceedings of IXth Particle-String-Cosmology

Scientific paper

10.1007/BF02705368

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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