An update on single field models of inflation in light of WMAP7

TL;DR

This paper reviews single field inflation models in light of WMAP7 data, confirming previous results and discussing implications for primordial black holes, non-Gaussianity, and potential observable tensor signals.

Contribution

It provides an updated assessment of single field inflation models considering WMAP7 data, highlighting the impact on primordial black hole production and non-Gaussianity bounds.

Findings

Results are consistent with previous WMAP data analyses.

Upper bounds on spectral index running affect primordial black hole formation.

Bounds on non-Gaussianity parameters are weakened, impacting inflation model constraints.

Abstract

In this paper we summarise the status of single field models of inflation in light of the WMAP 7 data release. We find little has changed since the 5 year release, and results are consistent with previous findings. The increase in the upper bound on the running of the spectral index impacts on the status of the production of Primordial Black Holes from single field models. The lower bound on the equilateral configuration of the non-gaussianity parameter is reduced and thus the bounds on the theoretical parameters of (UV) DBI single brane models are weakened. In the case of multiple coincident branes the bounds are also weakened and the two, three or four brane cases will produce a tensor-signal that could possibly be observed in the future.