Twist-3 contribution to deeply virtual electroproduction of pions

Abstract

The twist-3 contribution, consisting of twist-2 transversity generalized parton distributions (GPDs) and a twist-3 meson wave function, to deeply virtual pion electroproduction is discussed. The twist-3 meson wave function includes both the $q\bar{q}$ and the $q\bar{q}g$ Fock components. Two methods to regularize the end-point singularities are introduced - quark transverse momenta and a gluon mass. Using existing GPD parameterizations the transverse and the transverse-transverse interference cross sections for ${\pi }^0$ production are calculated and compared to experimental data.

40 pages, 10 figures; some improvements in the text and few typos corrected; corresponds to a published version

References in corpus (8)

• Extraction of Spin-Dependent Parton Densities and Their Uncertainties
• Transverse spin structure of the nucleon from lattice QCD simulations
• The deconvolution problem of deeply virtual Compton scattering
• Rosenbluth separation of the ${\pi }^0$ electroproduction cross section
• Spin Density Matrix Elements in Exclusive rho^0 Electroproduction on 1H and 2H Targets at 27.5 GeV Beam Energy
• Next-to-leading order corrections in exclusive meson production
• Wide-angle photo- and electroproduction of pions to twist-3 accuracy
• Three-loop QCD matching of the flavor-changing scalar current involving the heavy charm and bottom quark

Cited by in corpus (2)

• Study of deeply virtual Compton scattering at the future Electron-Ion Collider
• Unified and optimal frame choice for generalized parton distributions