Vector-Meson Electroproduction from Generalized Vector Dominance

Abstract

Including destructively interfering off-diagonal transitions of diffraction-dissociation type, we arrive at a formulation of GVD for exclusive vector-meson production in terms of a continuous spectral representation of dipole form. The transverse cross-section sigma_T for gamma* p -> V p behaves asymptotically as 1/Q^4, while R_V = sigma_L/sigma_T becomes asymptotically constant. Contributions violating s-channel helicity conservation stay at the 10-15% level established in low-energy photoproduction and diffractive hadron--hadron interactions. The data for phi- and rho-meson production for 0 \lsim Q^2 \lsim 20 GeV^2 from HERA are found to be in agreement with these predictions.

16 pages, latex, 3 figures

References in corpus (7)

• Total cross sections
• Diffractive Leptoproduction of Vector Mesons in QCD
• Vector meson leptoproduction and nonperturbative gluon fluctuations in QCD
• The QCD description of diffractive rho meson electroproduction
• Polarization in diffractive electroproduction of light vector mesons
• Vector Meson Production at HERA
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Cited by in corpus (14)

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• Exclusive vector meson production at an electron-ion collider
• Low-x scaling in ${\gamma }^{\ast }p$ total cross sections
• Exclusive diffractive production of real photons and vector mesons in a factorized Regge-pole model with non-linear Pomeron trajectory
• Exclusive J/Psi electroproduction in a dual model
• The total virtual photoabsorption cross section, deeply virtual Compton scattering and vector-meson production
• Exclusive ${\rho }^0$ Production in Polarized DIS at SMC
• Production of axial-vector mesons at $e^{+}{e}^{-}$ collisions with double-tagging as a way to constrain the axial meson LbL contribution to muon g-2 and/or hyperfine splitting of muonic hydrogen
• $\bar{d}-\bar{u}$ asymmetry and semi-inclusive production of pions in DIS
• Low x_{bj} DIS, QCD and Generalized Vector Dominance
• Summary of the Structure Function Working Group at DIS'99