The LHCb team stated yesterday that it "is charmed to announce observation of a new particle with two heavy quarks".

Geneva, 6 July 2017. Today at the EPS Conference on High Energy Physics in Venice, the LHCb experiment at CERN’s Large Hadron Collider has reported the observation of Ξcc++ (Xicc++) a new particle containing two charm quarks and one up quark. The existence of this particle from the baryon family was expected by current theories, but physicists have been looking for such baryons with two heavy quarks for many years. The mass of the newly identified particle is about 3621 MeV, which is almost four times heavier than the most familiar baryon, the proton, a property that arises from its doubly charmed quark content. It is the first time that such a particle has been unambiguously detected.

 

The paper describing the discovery can be found here: https://press.cern/sites/press.web.cern.ch/files/file/press/2017/07/lhcb_paper_2017.07.06.pdf

Edited July 7, 20178 yr by Daedalus

Nice to see theyre onto new successful collisions. I've been on a tour of LHC in 2013, the scale of this contraption is inredible. Met a lot of interesting people and even came back with a tshirt and some fridge particle magnets.

Nice paper, thanks for sharing