“Scientists at Fermilab have announced the discovery of a new particle – the neutral combination of a strange quark, an up quark and a bottom quark, which has been dubbed Xi-sub-b for now. It’s a neutral particle, making it a cousin to the neutron (which is comprised of one up quark and two down quarks). The existence of this particle is predicted by current ideas in physics, but…”
Fermilab Scientists Discover New Particle – Alex Knapp – Robot Overlords – Forbes.