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Testing parity-violating mechanisms with cosmic microwave background experiments

Gluscevic, Vera and Kamionkowski, Marc (2010) Testing parity-violating mechanisms with cosmic microwave background experiments. Physical Review D, 81 (12). Art. No. 123529. ISSN 2470-0010.

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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.

Item Type:Article
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URLURL TypeDescription DOIArticle
Kamionkowski, Marc0000-0001-7018-2055
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.
Group:TAPIR, Moore Center for Theoretical Cosmology and Physics
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-92-ER40701
Gordon and Betty Moore FoundationUNSPECIFIED
Issue or Number:12
Classification Code:PACS: 98.80.-k, 98.70.Vc
Record Number:CaltechAUTHORS:20100713-100910867
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19025
Deposited By: Tony Diaz
Deposited On:13 Jul 2010 20:34
Last Modified:03 Oct 2019 01:51

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