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Accessing GPDs from experiment --- potential of a high-luminosity EIC ---
High Energy Physics - Phenomenology · Submitted 4 May 2011
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Specific emphasis is given to the utilization of evolution effects at moderate x_Bj in a future high-luminosity experiment within a larger Q^2 lever arm.
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We discuss modeling of generalized parton distributions (GPDs), their access from present experiments, and the phenomenological potential of an electron-ion collider. In particular, we present a comparison of phenomenological models of GPD H, extracted from hard exclusive meson and photon production. Specific emphasis is given to the utilization of evolution effects at moderate x_Bj in a future high-luminosity experiment within a larger Q^2 lever arm.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We discuss modeling of generalized parton distributions (GPDs), their access from present experiments, and the phenomenological potential of an electron-ion collider. | contribution 0.84 | 0.51 | 0.11 | unclear 0.54 |
| s1 | In particular, we present a comparison of phenomenological models of GPD H, extracted from hard exclusive meson and photon production. | contribution 0.97 | 0.73 | 0.08 | asserted 0.97 |
| s2 | Specific emphasis is given to the utilization of evolution effects at moderate x_Bj in a future high-luminosity experiment within a larger Q^2 lever arm. | contribution 0.52 | 0.24 | 0.19 | asserted 0.53 |
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The paper
Original abstract
We discuss modeling of generalized parton distributions (GPDs), their access from present experiments, and the phenomenological potential of an electron-ion collider. In particular, we present a comparison of phenomenological models of GPD H, extracted from hard exclusive meson and photon production. Specific emphasis is given to the utilization of evolution effects at moderate x_Bj in a future high-luminosity experiment within a larger Q^2 lever arm.
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References
How the literature uses it
9 arXiv papers cite this in 13 sentences
Papers citing it · 10 sentences without a confident label
Compares with it 1 paper
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In Table [ref] we present the values of the CFFs, $H, E, H, E$, calculated at $x_Bj = 0.34, 0.37$, $-t= 0.17, 0.26$ GeV$^2$ and $Q^2 = 1.8, 4.5$ GeV$^2$, compared with the values from the analyses in Refs. [ref] .
Theory of Deeply Virtual Compton Scattering off the Unpolarized Proton · GPD Model · 1.00
Cites it as support 1 paper
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From these findings and information on GPDs, derived from DVCS data in LO approximation [ref] , one expects that a global GPD analysis at LO is hardly possible, whereas a NLO analysis should be more consistent.
Global analysis of generalized parton distributions -- collider kinematics -- · Introduction · 0.98
Cites it as background 1 paper
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In the future, exclusive vector meson production will be studied with unprecedented precision at the electron-ion collider (EIC) [ref] .
The $\rho$-meson light-cone distribution amplitudes from lattice QCD · Introduction · 0.80
What it cites · 86 sentences without a confident label
Builds on 1 paper
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An approach analogous to the one employed for DVCS in Ref. [ref] is also suitable for LO and NLO analysis of DVEM.
Towards a fitting procedure for deeply virtual Compton scattering at next-to-leading order and beyond · GPDs from hard exclusive measurements · 0.83
Uses the method or tool of 9 papers
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In Fig. [ref] we confront our fit results ($χ^2/d.o.f.≈1$ w.r.t. the employed data sets) to experimental data: KM09a (squares), KM09b (circles), and the hybrid model fit KM10b (triangles-up) in which we now utilized the improved formulae set [ref] and the Kelly form factor parameterization [ref] .
Exclusive electroproduction revisited: treating kinematical effects · GPDs from hard exclusive measurements · 0.98
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To relate the CFFs with the observables we employed the BKM formulas [ref] within the `hot-fix' convention [ref] and used the Sachs parameterization for the electromagnetic form factors.
Refined analysis of photon leptoproduction off spinless target · GPDs from hard exclusive measurements · 1.00
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To relate the CFFs with the observables we employed the BKM formulas [ref] within the `hot-fix' convention [ref] and used the Sachs parameterization for the electromagnetic form factors.
Theory of deeply virtual Compton scattering on the nucleon · GPDs from hard exclusive measurements · 1.00
Uses data or values from 10 papers
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The first set contains twist-two dominated (preliminary) beam spin asymmetry, [equation] and beam charge asymmetry, [equation] coefficients $A^(1)_BS$ and $A^(1)_BC$, respectively, from HERMES [ref] and 12 beam spin asymmetry coefficients $A^(1)_BS$, which we obtained by Fourier transform of selected CLAS [ref] data with small $-t$.
Measurement of Azimuthal Asymmetries With Respect To Both Beam Charge and Transverse Target Polarization in Exclusive Electroproduction of Real Photons · GPDs from hard exclusive measurements · 1.00
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The first set contains twist-two dominated (preliminary) beam spin asymmetry, [equation] and beam charge asymmetry, [equation] coefficients $A^(1)_BS$ and $A^(1)_BC$, respectively, from HERMES [ref] and 12 beam spin asymmetry coefficients $A^(1)_BS$, which we obtained by Fourier transform of selected CLAS [ref] data with small $-t$.
DVCS at HERMES: Recent Results · GPDs from hard exclusive measurements · 1.00
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The first set contains twist-two dominated (preliminary) beam spin asymmetry, [equation] and beam charge asymmetry, [equation] coefficients $A^(1)_BS$ and $A^(1)_BC$, respectively, from HERMES [ref] and 12 beam spin asymmetry coefficients $A^(1)_BS$, which we obtained by Fourier transform of selected CLAS [ref] data with small $-t$.
Deeply Virtual Compton Scattering Beam-Spin Asymmetries · GPDs from hard exclusive measurements · 1.00
Compares with 5 papers
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The squares arise from constrained least squares fits [ref] at given kinematic means of HERMES and JLAB measurements on unpolarized proton, where the imaginary and real parts of twist-two CFFs are taken as parameters.
A fitter code for Deep Virtual Compton Scattering and Generalized Parton Distributions · GPDs from hard exclusive measurements · 0.94
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The squares arise from constrained least squares fits [ref] at given kinematic means of HERMES and JLAB measurements on unpolarized proton, where the imaginary and real parts of twist-two CFFs are taken as parameters.
Generalized Parton Distributions from Deeply Virtual Compton Scattering at HERMES · GPDs from hard exclusive measurements · 0.94
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The pure $H$ and $H$ CFF fit [ref] (diamonds), including longitudinally polarized target data, is within error bars inconsistent with the $H$ dominated scenario [ref] (circles), however, (accidentally) reproduces our dashed curve.
Generalized Parton Distributions from Deep Virtual Compton Scattering at CLAS · GPDs from hard exclusive measurements · 0.92
Cites as support 2 papers
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Hence, we must conclude that in such measurements essentially only the GPD on the cross-over line (thanks to ([ref]), also outside of the experimentally accessible part of this line [ref] ) and the subtraction constant $D$ can be accessed.
Sum rules and dualities for generalized parton distributions: is there a holographic principle? · Introduction · 0.97
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That such a model provides reasonable results has been argued for the iso-triplet part of $H$ and $E$ [ref] .
Generic modelling of non-perturbative quantities and a description of hard exclusive $\pi^+$ electroproduction · GPD modeling · 0.99
Cites as background 8 papers
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First, GPDs might be defined as Radon transform of double distributions (DDs) [ref] : [equation] where integer $p ∈{0,1}$.
Nonforward Parton Distributions · GPD modeling · 0.94
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First, GPDs might be defined as Radon transform of double distributions (DDs) [ref] : [equation] where integer $p ∈{0,1}$.
Wave Functions, Evolution Equations and Evolution Kernels from Light-Ray Operators of QCD · GPD modeling · 0.94
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The reader might find a more detailed discussion, based on a $1/Q$ expansion, in Ref. [ref] .
Theory of deeply virtual Compton scattering on the nucleon · Potential of an electron-ion colider · 0.97
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