Charmonium photoproduction
| dc.creator | Sibirtsev, A. | |
| dc.creator | Krewald, S. | |
| dc.creator | Thomas, A. W. | |
| dc.date | 2003-01-27 | |
| dc.date.accessioned | 2026-07-07T05:39:28Z | |
| dc.date.available | 2026-07-07T05:39:28Z | |
| dc.description | The available data on $J/Ψ$ photoproduction are analyzed in terms of pomeron exchange, two gluon exchange and photon-gluon fusion models. Allowing the pomeron-quark interaction to be flavour dependent and introducing the soft and hard pomerons it is possible to reproduce the data at $\sqrt{s}{>}$10 GeV and small $|t|$. The two gluon exchange calculations indicate strong sensitivity to the gluon distribution function. The results obtained with the most modern MRST2001 and DL PDF reproduce the forward $J/Ψ$ photoproduction cross section at $\sqrt{s}{>}$10 GeV. The calculations with the photon-gluon fusion model and with MRST2001 and DL PDF are also in reasonable agreement with the data on the total $J/Ψ$ photoproduction cross section. We allocate the $J/Ψ$ photoproduction at low energies and large $|t|$ to the mechanism different from pomeron or two gluon exchanges. We consider that this might be axial vector trajectory exchange that couples to the axial form factor of the nucleon. | |
| dc.description | 11 pages, 11 figures, revtex4 | |
| dc.identifier | https://arxiv.org/abs/nucl-th/0301082 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/0301082 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/81973 | |
| dc.subject | Nuclear Theory | |
| dc.title | Charmonium photoproduction | |
| dc.type | text |