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That leaves cold dark matter - WIMPS, crumbly matter etc. So what I'm curious about is the possibility of any possible atomic construction of such particles that

**doesn't**involve extra dimensions.

As always, any suggestions will be appreciated greatly. I realise I'm not au fait with the mathematics of QM. Thats the reason I'm troubling the people here who are. Einsteins broad horizon is disapearing as he predicted.

My challenge to you is to construct a 3D particle, from first principles, that has mass enough to hold galaxies together - but will not tend to concentrate in the centre of galaxies.

As I'm being verbose and hoping for criticism I'll lay my cards on the table. My suspicion is that QM deals with a multi dimensional universe in ways that relativity doesn't. Thats not surprising - Einstein made his great advances mainly by considering a 4D universe. In Einsteins world the vacuum energy is negligable (hence the mistake that was not a mistake but in the end is an inaccurate assumption). Feynman has the correct value, kind of, for the vacuum energy. He just was unable to grasp the multi-dimensional nature of the universe hinted at (rather than described implicitly) by QM.

Discuss. Please.

Simon