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

L. Frankfurt, Mark Strikman

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Abstract

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 depen dence 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
Pages (from-to)315021-315025
Number of pages5
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume66
Issue number3
StatePublished - Aug 1 2002

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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