Spectrum of baryons with two heavy quarks

Antibaryons with flavor quantum numbers QQq, where Q is a heavy quark and q a light quark, have the two heavy antiquarks weakly bound into a small (compared with the QCD scale) color triplet system. Since the interactions of heavy color triplet objects with the light degrees of freedom (i.e. quarks and gluons) are independent of the heavy color triplet's spin and mass, the spectrum of baryons with two heavy quarks can be related to the spectrum of mesons with Qq flavor quantum numbers.