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Neutrino number asymmetry and cosmological birefringence

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arxiv 0706.0080 v2 pith:EZG34UTF submitted 2007-06-01 astro-ph hep-phhep-th

C. Q. Geng , S. H. Ho , J. N. Ng This is my paper · ORCID
classification astro-phhep-phhep-th
keywords asymmetrybirefringenceneutrinocosmologicalnumberpolarizationtermalternative
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abstract

We study a new type of effective interactions in terms of the $CPT$-even dimension-six Chern-Simons-like term, which could originate from superstring theory, to generate the cosmological birefringence. We use the neutrino number asymmetry to induce a sizable rotation polarization angle in the data of the cosmic microwave background radiation polarization. The combined effect of the new term and the neutrino asymmetry provides an alternative way to understand the birefringence.

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Cited by 1 Pith paper

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  1. 3-form dark energy and cosmic birefringence

    astro-ph.CO 2026-08 conditional novelty 6.0 of 10

    3-form dark energy can explain cosmic birefringence with a dimension-4 photon coupling, yielding redshift profiles that can mimic or differ from axion dark energy, but the implied photon mass estimate is numerically shaky.

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