Transplanckian signatures in WMAP3?

TL;DR

This paper explores whether rapid oscillations in the WMAP3 data's primordial spectrum could be explained by a transplanckian physics model, suggesting a possible low string scale around 2.2×10^{-5} times the Planck mass.

Contribution

It proposes an effective model incorporating back reaction to explain WMAP3 oscillations as a transplanckian physics signature.

Findings

Indicates a potential low fundamental scale near 2.2×10^{-5} M_{pl}

Suggests the oscillations could be a real transplanckian effect

Provides a framework for interpreting WMAP3 data in high-energy physics terms

Abstract

In this note we investigate how a possible signal in the WMAP3 data of rapid oscillations in the primordial spectrum can be accommodated into an effective model of transplanckian physics including back reaction. The results, if due to a real effect, would indicate the presence of a low fundamental scale -- possibly the string scale -- around $2.2\cdot10^{-5}M_{pl}$.