Alex, what ever happened to the idea that like charges repel?
If scientists are looking for a force of mutual repulsion, the only seemingly obvious culprit would be the old 'Like forces repel' It seems that it isn't limited to electrostatic charges either. Any hypothetical particle smaller than an electron would most likely be hard put to have a net electric charge.
Ok, so I'm maybe 120 years or so out dated on my science knowledge, but elementary particles can and do have a magnetic moment; they can interact with an external magnetic field. It could be that even at the elementary particle level magnetic moment interaction might account for the proposed dark energy effect. Even elementary particles it seens have an intrinsic spin moment. Gravity rain? maybe some relationship could exist at this level to the hypothetical gravitron, I don't know. I have yet to see any evidence of gravitational self repulsion, which leads me to think that gravity is an effect rather than a force of or in itself.
To sum up, if 2 elementary particles having an intrinsic magnetic moment come close enough to each other, mutual repulsion might well be observed.
Doug
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