Hard diffractive electroproduction of vector mesons in QCD

Leonid Frankfurt, Werner Koepf, Mark Strikman

Research output: Contribution to journalArticle

227 Citations (Scopus)

Abstract

Hard diffractive electroproduction of longitudinally polarized vector mesons is calculated within the leading [Formula presented] approximation of QCD using the leading order parton densities within the nucleon. Novel QCD features of the production of excited states and of the restoration of flavor symmetry are analyzed. At the onset of the asymptotic regime, our analysis finds an important role of quark Fermi motion within the diffractively produced vector mesons, and we suggest to use this effect to measure the high momentum tail of the wave function of the vector mesons. We deduce a kinematical boundary for the region of applicability of the decomposition of the hard amplitudes over powers of [Formula presented] and/or a limit on the increase of the cross sections of hard processes at small [Formula presented], and briefly analyze its consequences. We also estimate the nuclear attenuation of the diffractive electroproduction of vector mesons and compare with estimates of the shadowing of the longitudinal structure function.

Original languageEnglish (US)
Pages (from-to)3194-3215
Number of pages22
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume54
Issue number5
DOIs
StatePublished - Jan 1 1996

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vector mesons
quantum chromodynamics
estimates
restoration
partons
attenuation
wave functions
quarks
momentum
decomposition
cross sections
symmetry
approximation
excitation

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "Hard diffractive electroproduction of longitudinally polarized vector mesons is calculated within the leading [Formula presented] approximation of QCD using the leading order parton densities within the nucleon. Novel QCD features of the production of excited states and of the restoration of flavor symmetry are analyzed. At the onset of the asymptotic regime, our analysis finds an important role of quark Fermi motion within the diffractively produced vector mesons, and we suggest to use this effect to measure the high momentum tail of the wave function of the vector mesons. We deduce a kinematical boundary for the region of applicability of the decomposition of the hard amplitudes over powers of [Formula presented] and/or a limit on the increase of the cross sections of hard processes at small [Formula presented], and briefly analyze its consequences. We also estimate the nuclear attenuation of the diffractive electroproduction of vector mesons and compare with estimates of the shadowing of the longitudinal structure function.",
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Hard diffractive electroproduction of vector mesons in QCD. / Frankfurt, Leonid; Koepf, Werner; Strikman, Mark.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 54, No. 5, 01.01.1996, p. 3194-3215.

Research output: Contribution to journalArticle

TY - JOUR

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N2 - Hard diffractive electroproduction of longitudinally polarized vector mesons is calculated within the leading [Formula presented] approximation of QCD using the leading order parton densities within the nucleon. Novel QCD features of the production of excited states and of the restoration of flavor symmetry are analyzed. At the onset of the asymptotic regime, our analysis finds an important role of quark Fermi motion within the diffractively produced vector mesons, and we suggest to use this effect to measure the high momentum tail of the wave function of the vector mesons. We deduce a kinematical boundary for the region of applicability of the decomposition of the hard amplitudes over powers of [Formula presented] and/or a limit on the increase of the cross sections of hard processes at small [Formula presented], and briefly analyze its consequences. We also estimate the nuclear attenuation of the diffractive electroproduction of vector mesons and compare with estimates of the shadowing of the longitudinal structure function.

AB - Hard diffractive electroproduction of longitudinally polarized vector mesons is calculated within the leading [Formula presented] approximation of QCD using the leading order parton densities within the nucleon. Novel QCD features of the production of excited states and of the restoration of flavor symmetry are analyzed. At the onset of the asymptotic regime, our analysis finds an important role of quark Fermi motion within the diffractively produced vector mesons, and we suggest to use this effect to measure the high momentum tail of the wave function of the vector mesons. We deduce a kinematical boundary for the region of applicability of the decomposition of the hard amplitudes over powers of [Formula presented] and/or a limit on the increase of the cross sections of hard processes at small [Formula presented], and briefly analyze its consequences. We also estimate the nuclear attenuation of the diffractive electroproduction of vector mesons and compare with estimates of the shadowing of the longitudinal structure function.

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