Speculations Concerning Dark Matter and the
John A. Gowan
(This article has been translated into French -
many thanks to Kate Bondareva - see link below:)
It seems possible that "dark matter" may also be a form of "metric particle" created during the "Planck era" of quantum gravity early in the "Big Bang". In this scenario "dark matter" particles are formed through the compression of the spacetime metric by gravity at the same time the "Y" IVBs of the weak force are creating fractured primordial leptons (leptoquarks). "Metric particles" would be bosons carrying no charges other than gravitational "location" charge and hence (unfortunately) would be undetectable except in gravitationally significant aggregations. Their mass might be variable above a quantized minimum with a halflife inversely proportional to their mass, and their decays might likewise be continuous ("erosive") rather than the usual "all or nothing" of ordinary particles.
"Metric particles" are not miniature black holes; nevertheless, these are particles created by gravity rather than the electric, weak, or strong forces and are perhaps similar to the massive "Z" IVB of the weak force, or to massive photons. They function to absorb excess energy during the violent creation of the universe, perhaps acting as a "safety valve" or "buffer" preventing damage to the spacetime metric, and/or regulating the amount of primordial energy that is actually converted to ordinary particles ("baryonic matter"). That these particles apparently do not form star-like aggregations suggests they must (like neutrinos) be born with sufficient inertial energy to prevent it.
The eventual decay of "metric" particles directly to pure photons (without the emission of neutrinos) would contribute to the progressive reduction of the total gravitational field energy of the cosmos and hence to the observed "acceleration" of the expansion of the universe. In this case "dark matter" and "dark energy" are indeed connected, as both are gravitational phenomena, and the latter is simply the absence of the gravitational field energy of the former. Since these particles can only be detected "en mass" via their gravitational influence, almost nothing in the above scenario is testable, and however plausible, must remain in the realm of speculation.