Deeply virtual Compton scattering at small x_B and the access to the GPD H

Abstract

We give a partonic interpretation for the deeply virtual Compton scattering (DVCS) measurements of the H1 and ZEUS collaborations in the small-x_B region in terms of generalized parton distributions. Thereby we have a closer look at the skewness effect, parameterization of the t-dependence, revealing the chromomagnetic pomeron, and at a model dependent access to the anomalous gravitomagnetic moment of nucleon. We also quantify the reparameterization of generalized parton distributions resulting from the inclusion of radiative corrections up to next-to-next-to-leading order. Beyond the leading order approximation, our findings are compatible with a `holographic' principle that would arise from a (broken) SO(2,1) symmetry. Utilizing our leading-order findings, we also perform a first model dependent dispersion relation fit of HERMES and JLAB DVCS measurements. From that we extract the generalized parton distribution H on its cross-over line and predict the beam charge-spin asymmetry, measurable at COMPASS.

LaTeX, 71 page, 15 figures, Sect. 5 improved, matches published version

References in corpus (28)

• Parton distributions for the LHC
• Implications of CTEQ global analysis for collider observables
• Nucleon form-factors of the energy momentum tensor in the chiral quark-soliton model
• Towards a fitting procedure for deeply virtual Compton scattering at next-to-leading order and beyond
• MRST partons generated in a fixed-flavour scheme
• Dispersion representations for hard exclusive processes
• Dispersion relations and subtractions in hard exclusive processes
• Collider Physics at HERA
• A fitter code for Deep Virtual Compton Scattering and Generalized Parton Distributions
• Implication of the overlap representation for modelling generalized parton distributions
• Sum rules and dualities for generalized parton distributions: is there a holographic principle?
• Small x gluon from exclusive J/psi production
• Refined analysis of photon leptoproduction off spinless target
• On the D-term of the nucleon generalized parton distributions
• The dual parameterization of the proton generalized parton distribution functions H and E and description of the DVCS cross sections and asymmetries
• On "dual" parametrizations of generalized parton distributions
• Some numerical studies of the evolution of generalized parton distributions
• A Deeply Virtual Compton Scattering Amplitude
• Forward-like functions for dual parametrization of GPDs from nonlocal chiral quark model
• On the mistake in the implementation of the minimal model of the dual parameterization and resulting inability to describe the high-energy DVCS data
• Equivalence Principle and Partition of Angular Momenta in the Nucleon
• Taming Deeply Virtual Compton Scattering
• Pomeron dominance in deeply virtual Compton scattering and the femto holographic image of the proton
• ERBL and DGLAP kernels for transversity distributions. Two-loop calculations in covariant gauge
• DVCS via color dipoles: Nonperturbative effects
• Discussion on the recent proton-DVCS results of Jefferson Lab
• GPD sum rules: a tool to reveal the quark angular momentum
• Exclusive diffraction and Pomeron trajectory in ep collisions

Cited by in corpus (104)

• A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector
• The Spin Structure of the Nucleon
• Electron-Ion Collider in China
• Forces inside hadrons: pressure, surface tension, mechanical radius, and all that
• Generalized Parton Distributions in the valence region from Deeply Virtual Compton Scattering
• 50 Years of Quantum Chromodynamics
• GPD phenomenology and DVCS fitting - Entering the high-precision era
• An attempt to understand exclusive pi+ electroproduction
• Final Analysis of Proton Form Factor Ratio Data at ${\mathbf{Q}}^2=4.0$, 4.8 and 5.6 GeV${}^2$
• Electron Ion Collider: The Next QCD Frontier - Understanding the glue that binds us all
• Diquark Correlations in Hadron Physics: Origin, Impact and Evidence
• Cross sections for the exclusive photon electroproduction on the proton and Generalized Parton Distributions
• From hard exclusive meson electroproduction to deeply virtual Compton scattering
• Flexible Parametrization of Generalized Parton Distributions from Deeply Virtual Compton Scattering Observables
• The E00-110 experiment in Jefferson Lab's Hall A: Deeply Virtual Compton Scattering off the Proton at 6 GeV
• Beam-helicity and beam-charge asymmetries associated with deeply virtual Compton scattering on the unpolarised proton
• The Hadronic Final State at HERA
• On timelike and spacelike deeply virtual Compton scattering at next to leading order
• On timelike and spacelike hard exclusive reactions
• Exclusive electroproduction revisited: treating kinematical effects
• Deeply Virtual Compton Scattering to the twist-four accuracy: Impact of finite-$t$ and target mass corrections
• Beam-helicity asymmetry arising from deeply virtual Compton scattering measured with kinematically complete event reconstruction
• Phenomenological assessment of proton mechanical properties from deeply virtual Compton scattering
• From Bethe-Salpeter Wave Functions to Generalised Parton Distributions
• Description and interpretation of DVCS measurements
• Exclusive $J/\psi$ and ${\rm Y}$ photoproduction and the low $x$ gluon
• A Glimpse of Gluons through Deeply Virtual Compton Scattering on the Proton
• A Nakanishi-based model illustrating the covariant extension of the pion GPD overlap representation and its ambiguities
• Border and skewness functions from a leading order fit to DVCS data
• Neural network generated parametrizations of deeply virtual Compton form factors
• D-term and structure of point-like and composed spin-0 particles
• Generalized Parton Distributions and Their Singularities
• Separation of contributions from deeply virtual Compton scattering and its interference with the Bethe--Heitler process in measurements on a hydrogen target
• Test of two new parameterizations of the Generalized Parton Distribution $H$
• Constraints on the $\tilde{H}$ Generalized Parton Distribution from Deep Virtual Compton Scattering Measured at HERMES
• Towards a fitting procedure to deeply virtual meson production -- the next-to-leading order case --
• Transverse Extension of Partons in the Proton probed by Deeply Virtual Compton Scattering
• Covariant Extension of the GPD overlap representation at low Fock states
• Exclusive $J/\psi$ photoproduction in ultraperipheral Pb+Pb collisions at the LHC to next-to-leading order perturbative QCD
• How to include exclusive $J/\psi$ production data in global PDF analyses
• Deeply Virtual Compton Scattering at a Proposed High-Luminosity Electron-Ion Collider
• Generalized Parton Distributions: visions, basics, and realities
• Moments of proton GPDs from the OPE of nonlocal quark bilinears up to NNLO
• Extraction of the Compton Form Factor H from DVCS measurements at Jefferson Lab
• HERMES impact for the access of Compton form factors
• Generalized parton distributions through universal moment parameterization: zero skewness case
• Generalized parton distributions through universal moment parameterization: non-zero skewness case
• Deeply Virtual Compton Scattering from Gauge/Gravity Duality
• Where do we stand with a 3-D picture of the proton?
• A simple form for the low-x generalized parton distributions in the skewed regime
• Exclusive production of quarkonia as a probe of the GPD E for gluons
• The dynamic origins of fermionic D-terms
• Transition distribution amplitudes and hard exclusive reactions with baryon number transfer
• Transverse target spin asymmetries in exclusive ${\rho }^0$ muoproduction
• Generalized parton distributions at zero skewness
• Models of parton distributions and the description of form factors of nucleon
• Generalized Parton Distributions for the Proton in Position Space : Non-Zero Skewness
• Generalised parton distributions from the off-forward Compton amplitude in lattice QCD
• Generalized parton distributions in a light-front nonperturbative approach
• Dual parametrization of generalized parton distributions in two equivalent representations
• Advances in diffraction of subnuclear waves
• Beam charge asymmetries for deeply virtual Compton scattering off the proton
• The energy-momentum tensor and D-term of Q-clouds
• Flavor structure of generalized parton distributions from neutrino experiments
• Twist-3 Generalized Parton Distribution for the Proton from Basis Light-Front Quantization
• NLO corrections to the deeply virtual meson production revisited: impact on the extraction of generalized parton distributions
• Generalized parton distributions from the pseudo-distribution approach on the lattice
• Artificial neural network modelling of generalised parton distributions
• Impact of JLab data on the determination of GPDs at zero skewness and new insights from transition form factors $N\to \Delta$
• Parametrization of GPDs from t-channel string exchange in AdS spaces
• Status of DVMP, DVCS and GPDs
• On Extraction of Twist-Two Compton Form Factors from DVCS Observables Through Harmonic Analysis
• Higher-twist contributions to neutrino-production of pions
• Double deeply virtual Compton scattering with positron beams at SoLID
• Effects of next-to-leading order DGLAP evolution on generalized parton distributions of the proton and deeply virtual Compton scattering at high energy
• String-based parametrization of nucleon GPDs at any skewness: a comparison to lattice QCD
• Exploring twist-4 chiral-even GPDs in the light-front quark-diquark model
• Exploring Baryon Resonances with Transition Generalized Parton Distributions: Status and Perspectives
• Bethe-Heitler type radiative corrections to deeply virtual neutrinoproduction of mesons
• Accessing GPDs from experiment --- potential of a high-luminosity EIC ---
• Generalized parton distributions of sea quark at zero skewness in the light-cone Model
• Higher Twists
• Deeply Virtual Exclusive Processes and Generalized Parton Distributions
• Improved determination of $\bar{d}(x)-\bar{u}(x)$ flavor asymmetry in the proton by BONuS experiment at JLAB and using an approach by Brodsky, Hoyer, Peterson, and Sakai
• DVCS and the skewness effect at small x
• Accessing Compton Form Factors at the Electron Ion Collider in China: An Impact study on $\text{Im}\mathcal{E}$
• GPDs from present and future measurements
• Compton scattering: from deeply virtual to quasi-real
• Parametrizing Compton form factors with neural networks
• Global analysis of generalized parton distributions -- collider kinematics --
• Spin Physics: Session Summary
• Effective Field Theory Factorization for Diffraction
• Unified and optimal frame choice for generalized parton distributions
• Analysis of virtual meson production in solvable (1+1) dimensional scalar field theory
• A Unified Neural-Network Framework for Nucleon Imaging from Numerical Simulations of QCD
• Modeling the pion Generalized Parton Distribution
• New framework for extracting GPDs from exclusive photon electroproduction
• Conformal moments of the two-loop coefficient functions in DVCS
• Assessing the impact of the electron ion collider in China on Deeply Virtual Compton Scattering
• On the equivalence of GPD representations
• Deeply virtual Compton scattering using a positron beam in Hall-C at Jefferson Lab
• Generalised Parton Distributions: A Dyson-Schwinger approach for the pion
• Photon 2009: Summary of Theory Talks
• DVCS at HERMES