Wavefunction corrections and off-forward gluon distributions in diffractive $J/\psi$ electroproduction
Abstract
Diffractive production of $J/\Psi$ particles by virtual photons on a proton target is studied with a view towards understanding two important corrections to the leading order result. First, the effect of Fermi motion of the heavy quarks is studied by performing a systematic expansion in the relative velocity, and a simple correction factor is derived. This is considerably less than estimated previously. Second, since the kinematics necessarily requires that non-zero momentum be transferred to the proton, off-forward gluon distributions are probed by the scattering process. To estimate the importance of the off-forwardness, we compute, in leading order perturbation theory, the extent of deviation from the usual forward gluon distribution in a quark.
- Publication:
-
arXiv e-prints
- Pub Date:
- March 1997
- DOI:
- 10.48550/arXiv.hep-ph/9703365
- arXiv:
- arXiv:hep-ph/9703365
- Bibcode:
- 1997hep.ph....3365H
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 21 pages, LateX