As you are a theoretical physicist, have you tried to read: Future Circular Collider Study, Volume 1 - Physics Opportunities, Conceptual Design Report, PREPRIN

As you are a theoretical physicist, have you tried to read: Future Circular Collider Study, Volume 1 - Physics Opportunities, Conceptual Design Report, PREPRINT submitted to Eur. Phys. J. C, 20 December 2018 https://cds.cern.ch/record/2651294/files/CERN-ACC-2018-0056.pdf https://cds.cern.ch/record/2651294/files/CERN-ACC-2018-0056.... It's almost 200 pages about the "Physics Opportunities" of the next collider.