Correct, assuming that the excess will stay and that it is not an issue with the mismodelling of the background (which is being investigated at the time I write).
As for Hadron, I thought they had observed dark matter. Apparently I am not with the times.
They discovered many things, in particular the Higgs boson in 2012 and various composite states. In the last case, it is interesting to emphasise a new charmed tetraquark particle two days ago; this will be the topic of my next post but I don't think I won't find the time to write that post before next week. The LHC has also revealed various intriguing features, but it is too early to conclude anything about them.