Self-tuning solutions of the cosmological constant

TL;DR

This paper reviews the cosmological constant problem and introduces a novel self-tuning mechanism involving a 5D setup with a $1/H^2$ term and an antisymmetric field, aiming to address the problem.

Contribution

It presents the first nontrivial example of a self-tuning solution using a $1/H^2$ term in a 5D RS-II model, advancing the understanding of cosmological constant solutions.

Findings

Proposes a new self-tuning mechanism with a $1/H^2$ term.

Demonstrates the viability of the mechanism in a 5D RS-II framework.

Provides insights into potential resolutions of the cosmological constant problem.

Abstract

I briefly review the cosmological constant problem and attempts toward its solution, and present the first nontrivial example for the self-tuning mechanism with a $1/H^2$ term with the antisymmetric field strength $H_{MNPQ}$ in a 5D RS-II setup.