CERN Council reviews feasibility study for a next-generation collider (home.cern)

Would this be a different loop, but connected to LHC or is this a new standalone loop where they would need to find a locale to build it underground?

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What experiments would people like to do, that this new collider would make possible? What theories will be tested?

I think the money would be better spent on gravitational wave detectors as they might detect data about the true nature of black holes and help us develop a theory of quantum gravity or at least rule some out.

just one more accelerator bro. just one slightly larger accelerator than the one we just got online. we can revolutinize physics with just one more accelerator bro. Just give me 20 billion euros bro and we'll solve physics I promise br