A Simple No-Scale Model of Modulus Fixing and Inflation

TL;DR

This paper presents a straightforward no-scale inflation model fixing a single modulus with simple corrections, producing cosmological predictions consistent with observations.

Contribution

It introduces a minimal no-scale model of inflation with fixed moduli using power-law corrections to the Kähler potential, aligning with CMB data.

Findings

Achieves sufficient e-folds of inflation.

Predicts scalar spectral tilt compatible with observations.

Provides tensor-to-scalar ratio within observational bounds.

Abstract

We construct a no-scale model of inflation with a single modulus whose real and imaginary parts are fixed by simple power-law corrections to the no-scale K{\" a}hler potential. Assuming an uplift of the minimum of the effective potential, the model yields a suitable number of e-folds of expansion and values of the tilt in the scalar cosmological density perturbations and of the ratio of tensor and scalar perturbations that are compatible with measurements of the cosmic microwave background radiation.