Chameleon mechanism with a new potential

TL;DR

This paper introduces a new potential for the chameleon scalar field model, which exhibits a runaway form and satisfies existing constraints, offering a viable alternative for explaining the accelerating universe.

Contribution

The paper proposes a novel potential form for the chameleon scalar field that meets all known constraints, expanding the range of viable models for cosmic acceleration.

Findings

New potential satisfies chameleon constraints

Comparable or improved performance over existing potentials

Supports accelerating universe scenarios

Abstract

Chameleon scalar field is a new model, which introduced to provide a mechanism for exhibiting accelerating universe. Chameleon field has several interesting aspects, such as field dependence on the local matter density. For this model we introduce a new kind of potential which has run away form and satisfies chameleon constraints. The results are acceptable in comparison with the other potentials which studied up to now.