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.
@article{arxiv.0711.4617,
title = {Cosmological birefringence induced by neutrino current},
author = {C. Q. Geng and S. H. Ho and J. N. Ng},
journal= {arXiv preprint arXiv:0711.4617},
year = {2009}
}
Comments
8 pages, talk presented at ``Theory CANADA 3'', Edmonton, June 13 - 16, 2007