Observable Gravity Waves from Supersymmetric Hybrid Inflation II

TL;DR

This paper demonstrates that supersymmetric hybrid inflation models with TeV-scale soft supersymmetry breaking terms can produce observable tensor-to-scalar ratios near 0.03, aligning with Planck data and maintaining consistency with other cosmological measurements.

Contribution

It shows that supersymmetric hybrid inflation models with TeV-scale soft terms can generate observable gravitational waves, extending previous models with intermediate scale soft terms.

Findings

Tensor-to-scalar ratio r can reach 0.03

Scalar spectral index matches WMAP data

Models are consistent with Planck observations

Abstract

It is shown that a tensor-to-scalar ratio close to r = 0.03, which can be observed by Planck, is realized in supersymmetric hybrid inflation models with TeV-scale soft supersymmetry breaking terms. This extends our previous analysis, which also found r <~ 0.03 but employed intermediate scale soft terms. Other cosmological observables such as the scalar spectral index are in good agreement with the WMAP data.