Bigravity as an interpretation of the cosmic acceleration

TL;DR

This paper proposes a bimetric universe model where cosmic acceleration is explained by negative mass particles emitting negative energy photons, offering an alternative to dark energy.

Contribution

It introduces a novel bimetric framework linking negative mass particles to cosmic acceleration, challenging conventional dark energy explanations.

Findings

Cosmic acceleration can be explained without dark energy.

Negative mass particles emit negative energy photons.

The model aligns with high-redshift observations.

Abstract

A bimetric description of the universe is proposed, which explains cosmic acceleration deduced from optically observed high-redshift objects. This phenomenon is classically charged to a mysterious repulsive "dark energy" whose true nature is unknown. This is identified in this model with a set of particles having negative mass and energy. These negative mass particles, emitting negative energy photons, are not observable using optical instruments.