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.

arXiv comment40 pages, 10 figures; some improvements in the text and few typos corrected; corresponds to a published version

References in corpus (45)

• Generalized Parton Distributions
• Unraveling hadron structure with generalized parton distributions
• Factorization for hard exclusive electroproduction of mesons in QCD
• Off-Forward Parton Distributions
• Extraction of Spin-Dependent Parton Densities and Their Uncertainties
• Parton distribution functions and benchmark cross sections at NNLO
• Theoretical Update of Pseudoscalar Meson Distribution Amplitudes of Higher Twist: The Nonsinglet Case
• The role of the quark and gluon GPDs in hard vector-meson electroproduction
• Generalized parton distributions from nucleon form factor data
• An attempt to understand exclusive pi+ electroproduction
• Transversity in hard exclusive electroproduction of pseudoscalar mesons
• Hard diffractive electroproduction of vector mesons in QCD
• Evolution and models for skewed parton distributions
• Universality of Generalized Parton Distributions in Light-Front Holographic QCD
• Transverse spin structure of the nucleon from lattice QCD simulations
• Shape of Pion Distribution Amplitude
• Twist-three effects in two-photon processes
• Quark helicity flip generalized parton distributions from two-flavor lattice QCD
• From hard exclusive meson electroproduction to deeply virtual Compton scattering
• Second Moment of the Pion Light-cone Distribution Amplitude from Lattice QCD
• Wandzura-Wilczek approximation for the twist-3 DVCS amplitude
• The deconvolution problem of deeply virtual Compton scattering
• Deeply Virtual Compton Scattering to the twist-four accuracy: Impact of finite-$t$ and target mass corrections
• Rosenbluth separation of the ${\pi }^0$ electroproduction cross section
• A Critical Analysis of the Proton Form Factor with Sudakov Suppression and Intrinsic Transverse Momentum
• Single-spin azimuthal asymmetry in exclusive electroproduction of pi+ mesons on transversely polarized protons
• Spin Density Matrix Elements in Exclusive rho^0 Electroproduction on 1H and 2H Targets at 27.5 GeV Beam Energy
• Renormalization group analysis of the gluon mass equation
• Transversity in exclusive vector-meson leptoproduction
• Next-to-leading order corrections in exclusive meson production
• Hard exclusive meson production at next-to-leading order
• Exclusive ${\pi }^0$ electroproduction at $W>2$ GeV with CLAS
• Genuine twist 3 in exclusive electroproduction of transversely polarized vector mesons
• Proton-Proton Near-Forward Hard Elastic Scattering
• Twist-3 GPDs in Deeply-Virtual Compton Scattering
• Nonperturbative quark-antiquark interactions in mesonic form factors
• Measurement of the cross section for hard exclusive ${\pi }^0$ leptoproduction
• Exclusive photoproduction of ${\pi }^0$ up to large values of Mandelstam variables $s,t$ and $u$ with CLAS
• Rosenbluth separation of the ${\pi }^0$ Electroproduction Cross Section off the Neutron
• Deep exclusive electroproduction of ${\pi }^0$ at high $Q^2$ in the quark valence regime
• Next-to-leading order corrections to deeply virtual production of pseudoscalar mesons
• Twist-3 contributions to wide-angle photoproduction of pions
• Wide-angle photo- and electroproduction of pions to twist-3 accuracy
• Hard exclusive processes involving kaons
• Three-loop QCD matching of the flavor-changing scalar current involving the heavy charm and bottom quark

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