Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-07-02
Nucl.Phys. B514 (1998) 245-309
Physics
High Energy Physics
High Energy Physics - Phenomenology
65 pages, Latex, epsfig, 8 figures. Typos corrected and improvements made to the text. Version to appear on Nucl Phys. B
Scientific paper
10.1016/S0550-3213(97)00801-8
We present a calculation of next-to-leading-order (NLO) QCD corrections to total hadronic production cross sections and to light-hadron-decay rates of heavy quarkonium states. Both colour-singlet and colour-octet contributions are included. We discuss in detail the use of covariant projectors in dimensional regularization, the structure of soft-gluon emission and the overall finiteness of radiative corrections. We compare our approach with the NLO version of the threshold-expansion technique recently introduced by Braaten and Chen. Most of the results presented here are new. Others represent the first independent reevaluation of calculations already known in the literature. In this case a comparison with previous findings is reported.
Cacciari Matteo
Greco Mario
Maltoni Fabio
Mangano Michelangelo L.
Petrelli Andrea
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