Heavy Quarkonium Production: Extending CSM and COM
- Physique theorique fondamentale, Departement de Physique, Universite de Liege, allee du 6 Aout 17, bat. B5, B-4000 Liege 1 (Belgium)
By questioning the applicability of the static approximation of the Colour-Singlet Model, we have seen that the production amplitude receives contributions from two different cuts. The first one in its static limit gives the colour-singlet mechanism. The second one has not been considered so far. We treat it in a gauge-invariant manner by introducing necessary new 4-point vertices, suggestive of the colour-octet mechanism. This new contribution can be as large as the colour-singlet mechanism at high pT, however these vertices are not totally constrained and when the freedom in their determination is fully exploited, we are able to reproduce the production cross-sections at the Tevatron for the J/{psi}, {psi}' and {upsilon}(1S) and at RHIC for the J/{psi}.
- OSTI ID:
- 20726569
- Journal Information:
- AIP Conference Proceedings, Vol. 792, Issue 1; Conference: DIS 2005: 13. international workshop on deep inelastic scattering, Madison, WI (United States), 27 Apr - 1 May 2005; Other Information: DOI: 10.1063/1.2122163; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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