Possible solution to the main cosmological constant problem

TL;DR

This paper proposes a modified gravity model with two massless vector fields that dynamically cancel the cosmological constant, leading to a universe consistent with observed cosmology and Newtonian gravity.

Contribution

It introduces a novel vector field model that addresses the cosmological constant problem by dynamically canceling it within a cosmological framework.

Findings

Vector fields cancel arbitrary cosmological constant

Minkowski spacetime emerges as an attractor solution

Standard cosmological and Newtonian dynamics are recovered

Abstract

A modified-gravity-type model of two hypothetical massless vector fields is presented. These vector fields are gravitationally coupled to standard matter and an effective cosmological constant. Considered in a cosmological context, the vector fields dynamically cancel an arbitrary cosmological constant, and flat Minkowski spacetime appears as the limit of attractor-type solutions of the field equations. Asymptotically, the field equations give rise to a standard Friedmann-Robertson-Walker universe and standard Newtonian gravitational dynamics of small systems.