Artifact Dark Matter from Unified Brane Gravity

TL;DR

This paper explores how a geometrical dark component from brane embedding, consistent with Dirac's variation, could explain cosmological and galactic dark matter phenomena while preserving gravity's fundamental properties.

Contribution

It introduces a novel geometrical dark component in brane gravity that modifies the effective Newton constant, offering a new perspective on dark matter without altering graviton properties.

Findings

The Newton constant in brane cosmology is lower than the standard value.

The geometrical dark component can potentially explain dark matter effects.

Gravity remains massless and consistent with Newtonian law.

Abstract

Adopting Dirac's brane variation prescription, the energy-momentum tensor of a brane gets supplemented by a geometrical (embedding originated) dark component. While the masslessness of the graviton is preserved, and the Newton force law is recovered, the corresponding Newton constant is necessarily lower than the one which governs FRW cosmology. This has the potential to puzzle out cosmological dark matter, a subsequent conjecture concerning galactic dark matter follows.