[2] The first discovery of a charged Xi baryon was in cosmic ray experiments by the Manchester group in 1952.
[3] The first discovery of the neutral Xi particle was at Lawrence Berkeley Laboratory in 1959.
[2] The Xi spectrum is important to nonperturbative quantum chromodynamics (QCD), such as lattice QCD.[why?]
In 2012, the CMS experiment at the Large Hadron Collider detected a Ξ∗0b baryon (reported mass 5945±2.8 MeV/c2).
[8][9] Isospin and spin values in parentheses have not been firmly established by experiments, but are predicted by the quark model and are consistent with the measurements.