Quarkonia production at Fermilab

Recent data on J/ψ, ψ(2S), χc and γ production has unraveled unexpected features of Q bar Q bound states production in high energy hadronic collisions. In the 1992-1995 runs CDF has collected large samples of J/ψ, ψ(2S) and γ identified through their muonic decay. In the charmonium system all production sources have been separately measured and compared with the theoretical predictions. A large excess of direct production has been observed for both ψ(2S) and J/ψ. The relative production rate for the χc1 and χc2 has also been measured. Results on J/ψ, ψ(2S) and χc production from the fixed target experiments E789,E705 and E672/706 are also presented. Important features of the production of charmonium states are shared by fixed target and collider data