Soft-gluon resummation in heavy quarkonium physics

Soft-gluon resummation within the framework of heavy quarkonium hadroproduc tion is considered. A few selected cases an studied in detail. A sizeable i ncrease of the cross sections with respect to the next-to-leading order pre dictions with central factorization/renormalization scale choice can genera lly be observed. Improvements in the dependence of the cross sections on th e two scales, especially when they are kept equal, are also found. (C) 2000 Elsevier Science B.V. All rights reserved.