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

L. Frankfurt, M. Strikman

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79 Scopus citations


We argue that the t dependence of the two-gluon form factor of the nucleon should be given by Γ(t) = (1 -t/m2g2)-2 with m2g2 ≈ 1 GeV2. We demonstrate that this form provides a good description of the t dependence of the cross section of the elastic photoproduction of J/ψ mesons between the threshold region of Eγ = 11 GeV (Cornell), Eγ = 19 GeV (SLAC) and Eγ= 100 GeV (Fermilab), including the strong energy dependence of the t slope. It is also well matched with the recent DESY HERA data. The same assumption explains also the t dependence of φ-meson electroproduction near threshold at W=2.3 GeV, Q2 = 1.0 GeV2.

Original languageEnglish (US)
Article number031502
JournalPhysical Review D
Issue number3
StatePublished - 2002

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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