Spiral Inflation with Coleman-Weinberg Potential

TL;DR

This paper explores spiral inflation using the Coleman-Weinberg potential, demonstrating that observationally consistent inflation can occur across a wide symmetry-breaking scale range with moderate quartic coupling, and predicts a measurable tensor-to-scalar ratio.

Contribution

It introduces the application of spiral inflation to the Coleman-Weinberg potential, showing compatibility with observations for various symmetry-breaking scales and moderate coupling values.

Findings

Inflation compatible with observations across a broad symmetry-breaking scale range.

Tensor-to-scalar ratio can reach around 0.01 at GUT scale.

Moderate quartic coupling (∼0.1) suffices for successful inflation.

Abstract

We apply the idea of spiral inflation to Coleman-Weinberg potential, and show that inflation matching well observations is allowed for a symmetry-breaking scale ranging from an intermediate scale to GUT scale even if the quartic coupling $\lambda$ is of $\mathcal{O}(0.1)$. The tensor-to-scalar ratio can be of $\mathcal{O}(0.01)$ in case of GUT scale symmetry-breaking.