Fine Structure

CDF physicists have found a strange new particle produced rarely from B+ mesons (plus a K+, if you're keeping tabs on conservation) in proton/antiproton collisions which they're currently calling Y(4140). It's not completely unprecedented, however. Last year, CDF physicists also measured a similar particle currently called X(3872).

I thought we had that whole standard model thing pinned down. Apparently not.
http://www.symmetrymagazine.org/breaking/2009/03/18/particle-oddball-surprises-physicists/