Wavefunction corrections and off-forward gluon distributions in diffractive $J/ψ$ electroproduction

Details Wavefunction corrections and off-forward gluon distributions in diffractive $J/ψ$ electroproduction Wavefunction corrections and off-forward gluon distributions in diffractive $J/ψ$ electroproduction

1997-03-19

arxiv.org/abs/hep-ph/9703365v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, LateX

Scientific paper

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.

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