https://doi.org/10.1140/epjc/s2004-02090-1
theoretical physics
Inelastic 
and 
hadroproduction
1
Department of Physics and Institute for Particle Physics Phenomenology, University of Durham, DH1 3LE, UK
2
Petersburg Nuclear Physics Institute, 188300, Gatchina, St. Petersburg, Russia
3
Department of Mathematical Sciences, University of Durham, DH1 3LE, UK
We consider the prompt hadroproduction of 
and the 
states caused by the fusion of a symmetric colour-octet state, (gg)8s
, and an additional gluon. The cross sections are calculated in leading-order perturbative QCD. We find a considerable enhancement in comparison with previous perturbative QCD predictions. Indeed, the resulting cross sections are found to be consistent with the values measured at the Tevatron and RHIC, without the need to invoke non-perturbative ‘colour-octet’ type of contributions.
© Springer-Verlag, 2005
