Modelling generalized parton distributions to describe deeply virtual Compton scattering data

Abstract

We present a new model for generalized parton distributions (GPDs), based on the aligned jet model, which successfully describes the deeply virtual Compton scattering (DVCS) data from H1, ZEUS, HERMES and CLAS. We also present an easily implementable and flexible algorithm for their construction. This new model is necessary since the most widely used models for GPDs, which are based on factorized double distributions, cannot, in their current form, describe the DVCS data when employed in a full QCD analysis. We demonstrate explicitly the reason for the shortcoming in the data description. We also highlight several non-perturbative input parameters which could be used to tune the GPDs, and the $t$-dependence, to the DVCS data using a fitting procedure.

12 pages, 12 figures, revtex4, shortened version accepted for publication in PRD, figures improved and references added

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Cited by in corpus (59)

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• Leading twist nuclear shadowing phenomena in hard processes with nuclei
• Towards a fitting procedure for deeply virtual Compton scattering at next-to-leading order and beyond
• Exclusive photoproduction of a heavy vector meson in QCD
• The Beam--Charge Azimuthal Asymmetry and Deeply Virtual Compton Scattering
• Dispersion representations for hard exclusive processes
• Small-x Physics: From HERA to LHC and beyond
• Generalized Parton Distributions at x->1
• Measurement of Deeply Virtual Compton Scattering at HERA
• Collider Physics at HERA
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• Sum rules and dualities for generalized parton distributions: is there a holographic principle?
• Description and interpretation of DVCS measurements
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• Vector meson electroproduction at next-to-leading order
• Deeply Virtual Compton Scattering at a Proposed High-Luminosity Electron-Ion Collider
• The dual parameterization of the proton generalized parton distribution functions H and E and description of the DVCS cross sections and asymmetries
• HERMES impact for the access of Compton form factors
• On the A-dependence of nuclear generalized parton distributions
• Generalized parton distributions through universal moment parameterization: zero skewness case
• Novel two-to-three hard hadronic processes and possible studies of generalized parton distributions at hadron facilities
• Deeply virtual Compton scattering beyond next-to-leading order: the flavor singlet case
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• Nonperturbative versus perturbative effects in generalized parton distributions
• A Deeply Virtual Compton Scattering Amplitude
• Virtual Compton scattering in the generalized Bjorken region and positivity bounds on generalized parton distributions
• Flavor structure of generalized parton distributions from neutrino experiments
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• A Kinematically Complete Analysis of the CLAS data on the Proton Structure Function $F_2$ in a Regge-Dual model
• NLO QCD corrections to exclusive electroproduction of quarkonium
• Polynomiality of helicity off-forward distribution functions in the chiral quark-soliton model
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• Determination of generalized parton distributions through a simultaneous analysis of axial form factor and wide-angle Compton scattering data
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• Higher-twist contributions to neutrino-production of pions
• QCD evolution and skewedness effects in color dipole description of DVCS
• Effects of next-to-leading order DGLAP evolution on generalized parton distributions of the proton and deeply virtual Compton scattering at high energy
• Deeply Virtual Neutrino Scattering (DVNS)
• The total virtual photoabsorption cross section, deeply virtual Compton scattering and vector-meson production
• Demystifying generalized parton distributions
• Heavy quarks in deeply virtual Compton scattering
• Inequalities for nucleon generalized parton distributions with helicity flip
• Bethe-Heitler type radiative corrections to deeply virtual neutrinoproduction of mesons
• Separation of Soft and Hard Physics in Deeply Virtual Compton Scattering
• The dual parametrization for gluon GPDs
• Deeply Virtual Compton Scattering on nucleons and nuclei in generalized vector meson dominance model
• Loop corrections to pion and kaon neutrinoproduction
• Deeply Virtual Exclusive Processes and Generalized Parton Distributions
• Hard exclusive production of a vector meson
• Nuclear effects in neutrinoproduction of pions
• Study of Generalized Parton Distributions with CLAS