Two-gluon form factor of the nucleon and $J/ψ$ photoproduction

L. Frankfurt; M. Strikman

Paper

Two-gluon form factor of the nucleon and $J/ψ$ photoproduction

Abstract

We argue that the t-dependence of the two-gluon form factor of the nucleon should be given by

with

. We demonstrate that this form provides a good description of the t-dependence of the cross section of the elastic photoproduction of

-mesons between the threshold region of

(Cornell),

(SLAC) and

(FNAL) including the strong energy dependence of the t-slope. It is also well matched with the recent HERA data. The same assumption explains also the t-dependence of

-meson electroproduction near threshold at