Bounds on Generic High-Energy Physics Modifications to the Primordial Power Spectrum from Back-Reaction on the Metric

Details Bounds on Generic High-Energy Physics Modifications to the Primordial Power Spectrum from Back-Reaction on the Metric Bounds on Generic High-Energy Physics Modifications to the Primordial Power Spectrum from Back-Reaction on the Metric

2004-02-05

arxiv.org/abs/hep-th/0402038v2

Phys.Lett. B596 (2004) 306-310

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, Latex. References added, misprints corrected. To appear in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2004.06.090

Modifications to the primordial power spectrum of inflationary density perturbations have been studied recently using a boundary effective field theory approach. In the approximation of a fluctuating quantum field on a fixed background, the generic effect of new physics is encoded in parameters of order H/M. Here, we point out that the back-reaction on the metric can be neglected only when these parameters obey certain bounds that may put them beyond the reach of observation.

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