Gluscevic, Vera and Kamionkowski, Marc (2010) Testing parity-violating mechanisms with cosmic microwave background experiments. Physical Review D, 81 (12). Art. No. 123529. ISSN 0556-2821. http://resolver.caltech.edu/CaltechAUTHORS:20100713-100910867
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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 nonzero 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 the case of a high-signal-to-noise detection of TB/EB correlations. Appendix evaluates the relative sensitivities of the BB, TB, and EB signals for detecting a chiral gravitational-wave background.
|Additional Information:||© 2010 The American Physical Society. Received 5 February 2010; published 24 June 2010. V. G. thanks Timothy Morton for useful comments. This work was supported by DoE DE-FG03-92-ER40701 and the Gordon and Betty Moore Foundation.|
|Classification Code:||PACS: 98.80.-k, 98.70.Vc|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||13 Jul 2010 20:34|
|Last Modified:||26 Dec 2012 12:13|
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