That's incorrect. If they don't detect it, a new theory will be required. Some of them are even more excited about that than actually finding it.
If they don't detect DM, DM theory will just go on lad. There will be a new theory as to why they could not detect the DM that theoretical astrophysiists are adamant is there. There will zero deviation from Dogma. This is not a slight of the guys at Cern, I am just pointing out that nothing they are about to do is aimed at ruling out dark matter theory.
More to the point it would take someone at Cern with absolutely enormous balls to come out and say Dark matter does not exist, immediately the individual that made that claim would come under intense pressure to prove it, even though dark matter has never been proven to exist in the first place


