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arXiv · 1002.1308

Testing Parity-Violating Mechanisms with Cosmic Microwave Background Experiments

Vera Gluscevic·Marc Kamionkowski
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Abstract

Chiral gravity and cosmological birefringence both provide physical mechanisms to produce parity-violating TB and EB correlations in the cosmic microwave background (CMB) temperature/polarization. Here, we study how well these two mechanisms can be distinguished if non-zero TB/EB correlations are found. To do so, we evaluate the correlation matrix, including new TB-EB covariances. We find that the effects of these two mechanisms on the CMB are highly orthogonal, and can thus be distinguished fairly well in case of a high--signal-to-noise detection of TB/EB correlations. An Appendix evaluates the relative sensitivities of the BB, TB, and EB signals for detecting a chiral gravitational-wave background.

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Vera Gluscevic, Marc Kamionkowski. 2010-02-05. Testing Parity-Violating Mechanisms with Cosmic Microwave Background Experiments. https://doi.org/10.1103/physrevd.81.123529

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