Heavy-quarkonium production at next-to-leading order

Abstract

We review recent progress in the description of heavy-quarkonium production in 2->2 processes at next-to-leading order in the factorization framework of nonrelativistic quantum chromodynamics. Specifically, we consider the production of prompt charmonium in association with a hadron jet or a prompt photon in two-photon collisions and exclusive double-charmonium production in e^+e^- annihilation.

Comments: 6 pages; 3 figures; plenary talk presented at the International Conference on QCD and Hadronic Physics, Beijing, China, June, 16-20, 2005