Abstract
A scheme is presented to cancel out topologically unfactorized infrared divergences in the inclusive production of heavy quarkonia, which affect the nonrelativistic QCD (NRQCD) factorization of these processes. Heavy quarkonia are defined as resonance states of QCD instead of a color-singlet heavy quark pair. Thus the final heavy quark pair is not necessarily a color singlet. In addition, heavy quarkonia are reconstructed from their decay products. As a result, the transitions between states containing heavy quarks caused by exchanges of soft gluons are also taken into account here. Such cancellation is crucial for the NRQCD factorization of these processes.
3 More- Received 22 December 2015
DOI:https://doi.org/10.1103/PhysRevD.93.105035
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