Screening Corrections in Photo and DIS Production of $J/Ψ$

Details Screening Corrections in Photo and DIS Production of $J/Ψ$ Screening Corrections in Photo and DIS Production of $J/Ψ$

2001-01-14

arxiv.org/abs/hep-ph/0101142v1

Phys.Lett. B503 (2001) 277-284

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 5 figures in eps files

Scientific paper

10.1016/S0370-2693(01)00224-6

Photo and DIS production of $J/\Psi$ are investigated and compared with calculations based on pQCD in the LLA approximation without and with screening corrections. The calculation includes corrections induced by the real part of the production amplitude, the skewed (off diagonal) gluon structure function and the relativistic Fermi motion within the charmonium system. Our pQCD results are also compared with the predictions obtained from a Regge type two Pomeron model. Our results suggest some preference for our screened model, but the available data does not enable us to exclude any of the three models we have examined. The properties of these models, when extrapolated to both low and very high energies may provide a more effective discrimination between the different parameterizations.

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