Kinematic Effects in Quarkonia Production
arXiv:hep-ph/0008180 · doi:10.1016/S0920-5632(00)01097-5
Abstract
We investigate energy (momentum) distributions in J/Psi photoproduction and J/Psi production in B meson decay. In particular the upper endpoint region of the spectrum is examined where the effect of soft gluon emission from the ccbar pair becomes important. Constructing a model which is consistent with the so-called shape function formalism we consider these fragmentation effects and show that the relevance of possible colour octet contributions in the photoproduction channel is still inconclusive.
LaTeX, 7 pages, 3 figures, The complete paper is also available via the www at http://www-ttp.physik.uni-karlsruhe.de/Preprints/