Tachyon Inflation in $R+R^2$ Background

TL;DR

This paper investigates how a tachyon field influences cosmological parameters within an $R+ ext{R}^2$ gravity framework, despite its suppressed energy density contribution.

Contribution

It introduces the effect of a tachyon field in $R+ ext{R}^2$ gravity on cosmological parameters, highlighting its impact despite low energy density contribution.

Findings

Tachyon energy density contribution is suppressed.

Tachyon field affects cosmological parameters.

Implications for modified gravity cosmology.

Abstract

The presence of a tachyon field in $R+\mu R^2$ is considered. Our analysis shows that the contribution of the tachyon field in energy density is suppressed, but it affects cosmological parameters.