Minimal Model of Dilatonic Gravity and Cosmological Constant

TL;DR

This paper explores a minimal scalar-tensor gravity model with a focus on the cosmological constant problem, analyzing experimental constraints and proposing a new approach based on the universe's action and scale factor evolution.

Contribution

It introduces a minimal scalar-tensor gravity model with a specific Brans-Dicke factor and develops a novel approach to the cosmological constant problem using universe's action and scale factor dynamics.

Findings

Constraints on the model from gravitational experiments

A new approach to the cosmological constant problem

Determination of the potential () using universe's scale factor evolution

Abstract

We consider: minimal scalar-tensor model of gravity with Brans-Dicke factor $\omega(\Phi)\equiv 0$ and cosmological factor $\Pi(\Phi)$; restrictions on it from gravitational experiments; qualitative analysis of new approach to cosmological constant problem based on the huge amount of action in Universe; determination of $\Pi(\Phi)$ using time evolution of scale factor of Universe.