Enhancing non-Gaussianities by breaking local Lorentz invariance

Details Enhancing non-Gaussianities by breaking local Lorentz invariance Enhancing non-Gaussianities by breaking local Lorentz invariance

2009-11-14

arxiv.org/abs/0911.2786v1

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, 1 figure; a talk presented at the Invisible Universe International Conference at the Palais de l'UNESCO, Paris

Scientific paper

This talk briefly explains how the breaking of a Lorentz-invariant description of nature at tiny space-time intervals might affect the non-Gaussian character of the primordial fluctuations left by inflation. For example, a model that contains irrelevant operators that only preserve the spatial symmetries along constant-time surfaces can generate a larger non-Gaussian component in the pattern of primordial fluctuations than is ordinarily predicted by inflation. This property can be useful for constraining models that allow some Lorentz violation at short distances, beyond the constraints possible from the power spectrum alone.

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