Cosmological birefringence induced by neutrino current

Astronomy and Astrophysics – Astrophysics

Scientific paper

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8 pages, talk presented at ``Theory CANADA 3'', Edmonton, June 13 - 16, 2007

Scientific paper

10.1139/P07-178

We review our recent work on the cosmological birefringence. We propose a new
type of effective interactions in terms of the $CPT$-even dimension-six
Chern-Simons-like term to generate the cosmological birefringence. We use the
neutrino number asymmetry to induce a non-zero rotation polarization angle in
the data of the cosmic microwave background radiation polarization.

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