Color-octet quarkonia production.

@article{Cho1996ColoroctetQP,
  title={Color-octet quarkonia production.},
  author={Cho and Leibovich},
  journal={Physical review. D, Particles and fields},
  year={1996},
  volume={53 1},
  pages={
          150-162
        }
}
Gluon fragmentation represents the dominant source of high energy prompt quarkonia at hadron colliders. Fragmentation approximations break down, however, when a quarkonium’s tranvserse momentum becomes comparable to its mass. In this paper we identify a large class of color-octet diagrams that mediate quarkonia production at all energies and reduce to the dominant set of gluon fragmentation graphs in the high p⊥ limit. They contribute to quarkonia differential cross sections at the same order… CONTINUE READING

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