Gluon fragmentation into heavy quarkonium
Gluon fragmentation into heavy quarkonium
The dominant production mechanism for heavy-quark--antiquark bound states with large transverse momentum is fragmentation, the splitting of a high energy parton into a quarkonium state and other partons. We show that the fragmentation functions D(z,\ensuremath{\mu}) describing these processes can be calculated using perturbative QCD. We calculate the fragmentation functions for …