Hard Processes with Spin-Dependent Parton Distributions
arXiv:hep-ph/9705310 · doi:10.1016/S0168-9002(97)00851-6
Abstract
To test a possible color-octet contribution of heavy quarkonium productions, we propose $Ï$'-productions for small-$p_T$ regions, where the color-singlet $Ï$' state cannot be produced by the gluon-gluon fusion owing to charge conjugation. We also point out that these processes are very useful to deduce informations of spin-dependent gluon distributions $Îg$.
4 pages + 3 Postscript figures(2 PS files), LaTeX, Talk presented at International Workshop HELION97, Kobe, Japan, 20-24 Jan. 1997