An attempt to understand exclusive pi+ electroproduction

Abstract

Hard exclusive pi+ electroproduction is investigated within the handbag approach. The prominent role of the pion-pole contribution is demonstrated. It is also shown that the experimental data require a twist-3 effect which ensues from the helicity-flip generalized parton distribution H_T and the twist-3 pion wave function. The results calculated from this handbag approach are compared in detail with the experimental data on cross sections and spin asymmetries measured with a polarized target. It is also commented on consequences of this approach for exclusive π^0 and vector-meson electroproduction.

35 pages, 12 figures, using Latex, a number of additional comments have been included in the text, e.g. in paragraph above (3) or at end of sect. 9

References in corpus (11)

• Deeply virtual Compton scattering at small x_B and the access to the GPD H
• Charged pion form factor between $Q^2$=0.60 and 2.45 GeV${}^2$. I. Measurements of the cross section for the ${}^1$H($e,e^{\prime }{\pi }^{+}$)$n$ reaction
• Nucleon Tensor Charge from Exclusive ${\pi }^o$ Electroproduction
• Cross sections for hard exclusive electroproduction of pi+ mesons on a hydrogen target
• Single-spin azimuthal asymmetry in exclusive electroproduction of pi+ mesons on transversely polarized protons
• Next-to-leading order corrections in exclusive meson production
• Double spin asymmetry in exclusive rho^0 muoproduction at COMPASS
• Taming Deeply Virtual Compton Scattering
• Deep exclusive electroproduction of ${\pi }^{+}$ at HERMES
• Successful description of exclusive vector meson electroproduction
• QCD factorization beyond leading twist in exclusive rho(T) meson production

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