In a ‘Dark Dimension,’ Physicists Search for the Universe’s Missing Matter

Joined: 28 May 05
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Topic 230724


An idea derived from string theory suggests that dark matter is hiding in a (relatively) large extra dimension. The theory makes testable predictions that physicists are investigating now.

Will they verify this in next future? It would be great! And it would be a first proof of String Theory, too, as I know.

Kind regards and happy crunching


Mike Hewson
Mike Hewson
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Interesting. Massive

Interesting. Massive gravitons, hidden under the rug as it were, can explain some gross features of gravity. This has roots in, say, Lisa Randall's works with off-brane gravity. They propose tests : in the small and in the large. A micron scale extra dimension hasn't heretofore been ruled out as no one has succeeded in validating gravity at that scale. So cue some new investigations! That is of merit.

So yes, String Theory may not be unmeasurable rubbish after all.

I do wonder if someone has looked at the thermodynamics of this as well. After all a modest ( but not huge ) extra degree of freedom ought be utilised by ( gravitation & gravitationally linked ) processes to change the statistics of particle ensembles.

Cheers, Mike. 

I have made this letter longer than usual because I lack the time to make it shorter ...

... and my other CPU is a Ryzen 5950X :-) Blaise Pascal

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