Unmissing the Missing Matter in Neo-Kaluza-Klein Universes

TL;DR

This paper proposes that uncompactified Kaluza-Klein universes naturally explain dark matter and extra dimensions without exotic particles, by linking their properties to observable phenomena and gravitational collapse.

Contribution

It introduces a model where uncompactified KK universes unify dark matter explanation and extra dimension unobservability, replacing traditional compactification mechanisms.

Findings

Uncompactified KK universes can explain dark matter as missing light.

Spontaneous gravitational collapse of extra dimensions replaces compactification.

The model addresses density fluctuation issues in early universe cosmology.

Abstract

Uncompactified KK universes are so intrinsically connected to the otherwise only empirically required "missing" Dark Matter (DM), that: 1) They yield a simple prediction which explains both the enigma of the extra-dimensions' (XD) unobservability and the enigma of the present DM. The two enigmas are "annihilated" into the hypothesis of "missing light", or better of "photonland". This eliminates the very need to hypothesize/search/find DM-candidates of exceptional/exotic properties to explain their darkness. 2) An early, spontaneous gravitational XD-collapse of their natural 5D-DM replaces KK's compactification mechanisms and cylindricity condition, and (partly?) eliminates the quandary of the radically insufficient density fluctuations.