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We briefly review the existing psi(2S) data taken at RHIC, the Tevatron andthe LHC. We systematically compare them with colour-singlet-model predictionsas a function of the center-of-mass energy, of the quarkonium rapidity and ofthe quarkonium transverse momentum. The overall agreement is good except forlarge transverse momenta. This points at the existence of large NNLOcorrections or points at colour-octet dominance.

Psi(2S) production in proton-proton collisions at RHIC, Tevatron and LHC energies