Electromagnetic properties of a neutrino stream

Details Electromagnetic properties of a neutrino stream Electromagnetic properties of a neutrino stream

2000-01-10

arxiv.org/abs/hep-ph/0001067v1

Phys.Rev. D61 (2000) 113008

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revtex, 19 pages and 3 included ps files

Scientific paper

10.1103/PhysRevD.61.113008

In a medium that contains a neutrino background in addition to the matter particles, the neutrinos contribute to the photon self-energy as a result of the effective electromagnetic vertex that they acquire in the presence of matter. We calculate the contribution to the photon self-energy in a dense plasma, due to the presence of a gas of charged particles, or neutrinos, that moves as a whole relative to the plasma. General formulas for the transverse and longitudinal components of the photon polarization tensor are obtained in terms of the momentum distribution functions of the particles in the medium, and explicit results are given for various limiting cases of practical interest. The formulas are used to study the electromagnetic properties of a plasma that contains a beam of neutrinos. The transverse and longitudinal photon dispersion relations are studied in some detail. Our results do not support the idea that neutrino streaming instabilities can develop in such a system. We also indicate how the phenomenon of optical activity of the neutrino gas is modified due to the velocity of the neutrino background relative to the plasma. The general approach and results can be adapted to similar problems involving relativistic plasmas and high-temperature gauge theories in other environments.

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