Is cosmic parity violation responsible for the anomalies in the WMAP data?
Abstract
In this Letter, I argue that a parity violating extension to general relativity can simultaneously explain the observed loss in power and provides a first step for explaining the alignment at a preferred axis (‘Axis of Evil’) in the low multipole moments of the WMAP data. This observational possibility also provides an experimental window for an inflationary leptogenesis mechanism arising from large-scale parity violation. Similar to the arguments of Contaldi, Peloso, Kofman and Linde, large scale power is suppressed from the backreaction of the parity violating term by inducing a velocity dependent potential. We also argue that this modification can supress power of odd parity multipoles on large scales, a pattern that is observed in the WMAP alignment anomaly.
- Publication:
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Physics Letters B
- Pub Date:
- March 2008
- DOI:
- arXiv:
- arXiv:hep-th/0601034
- Bibcode:
- 2008PhLB..660..444A
- Keywords:
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- High Energy Physics - Theory;
- Astrophysics
- E-Print:
- 5 pages, included new references, expanded on some calculations