Unmissing the Missing Matter in Neo-Kaluza-Klein Universes

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.