Nucleon form factors, generalized parton distributions and quark angular momentum

Abstract

We extract the individual contributions from u and d quarks to the Dirac and Pauli form factors of the proton, after a critical examination of the available measurements of electromagnetic nucleon form factors. From this data we determine generalized parton distributions for valence quarks, assuming a particular form for their functional dependence. The result allows us to study various aspects of nucleon structure in the valence region. In particular, we evaluate Ji's sum rule and estimate the total angular momentum carried by valence quarks at the scale mu = 2 GeV to be J_v^u = 0.230 +0.009 -0.024 and J_v^d = -0.004 +0.010 -0.016.

58 pages, 27 figures

References in corpus (22)

• Parton distributions for the LHC
• New parton distributions for collider physics
• High-precision determination of the electric and magnetic form factors of the proton
• Extraction of Spin-Dependent Parton Densities and Their Uncertainties
• Muonic hydrogen and the proton radius puzzle
• Global analysis of proton elastic form factor data with two-photon exchange corrections
• Relations between generalized and transverse momentum dependent parton distributions
• Dynamical parton distributions of the nucleon and very small-x physics
• Flavor decomposition of the elastic nucleon electromagnetic form factors
• Measurements of the Electric Form Factor of the Neutron up to Q2=3.4 GeV2 using the Reaction He3(e,e'n)pp
• Measurement of Strange Quark Contributions to the Vector Form Factors of the Proton at Q**2=0.22 (GeV/c)**2
• Measurement of the proton electric to magnetic form factor ratio from \vec ^1H(\vec e, e'p)
• Polarization Transfer in the 4He(e,e'p)3H Reaction at Q^2 = 0.8 and 1.3 (GeV/c)^2
• Proton G_E/G_M from beam-target asymmetry
• Electromagnetic form factors of the nucleon: new fit and analysis of uncertainties
• The Charge Form Factor of the Neutron at Low Momentum Transfer from the ${}^2\vec{\mathrm{H}}(\vec{\mathrm{e}},{\mathrm{e}}^{\prime }\mathrm{n})\mathrm{p}$ Reaction
• Flavor decomposition of the nucleon electromagnetic form factors
• Extraction of the Neutron Magnetic Form Factor from Quasi-Elastic 3He(pol)(e(pol),e') at Q^2 = 0.1 - 0.6 (GeV/c)^2
• Compton Scattering Cross Section on the Proton at High Momentum Transfer
• Spin and Flavor Strange Quark Content of the Nucleon
• Nucleon Structure and Hyperon Form factor from Lattice QCD
• Quark angular momentum and the Sivers asymmetry

Cited by in corpus (93)

• 50 Years of Quantum Chromodynamics
• GPD phenomenology and DVCS fitting - Entering the high-precision era
• Universality of Generalized Parton Distributions in Light-Front Holographic QCD
• Diquark Correlations in Hadron Physics: Origin, Impact and Evidence
• Hadron tomography by generalized distribution amplitudes in pion-pair production process ${\gamma }^{\ast }\gamma \to {\pi }^0{\pi }^0$ and gravitational form factors for pion
• The Spin Structure of the Nucleon
• Polarization Transfer Observables in Elastic Electron Proton Scattering at $Q^2=$2.5, 5.2, 6.8, and 8.5 GeV${}^2$
• Deeply Virtual Meson Production on the nucleon
• Generalized parton distributions and transverse densities in a light-front quark-diquark model for the nucleons
• Nucleon structure from basis light-front quantization
• Proton structure from a light-front Hamiltonian
• A light front quark-diquark model for the nucleons
• Nucleon Form Factors and Distribution Amplitudes in QCD
• Nucleon and flavor form factors in a light front quark model in AdS/QCD
• Border and skewness functions from a leading order fit to DVCS data
• Accessing proton generalized parton distributions and pion distribution amplitudes with the exclusive pion-induced Drell-Yan process at J-PARC
• Transversity in exclusive vector-meson leptoproduction
• Exclusive photoproduction of a $\gamma \rho$ pair with a large invariant mass
• Test of two new parameterizations of the Generalized Parton Distribution $H$
• A Fixed-Target Programme at the LHC: Physics Case and Projected Performances for Heavy-Ion, Hadron, Spin and Astroparticle Studies
• Generalized Parton Distributions: visions, basics, and realities
• The Parton Orbital Angular Momentum: Status and Prospects
• Modelling the nucleon structure
• Nucleon structure in a light-front quark model consistent with quark counting rules and data
• The pion pole in hard exclusive vector-meson leptoproduction
• Where do we stand with a 3-D picture of the proton?
• Nucleon parton distributions in a light-front quark model
• Electromagnetic structure of nucleon and Roper in soft-wall AdS/QCD
• $\rho$ meson unpolarized generalized parton distributions with a light-front constituent quark model
• Transverse-momentum-dependent parton distribution functions up to twist 4 for spin-1 hadrons
• Tomography of exotic hadrons in high-energy exclusive processes
• Models of parton distributions and the description of form factors of nucleon
• Generalized parton distributions at zero skewness
• Determination of the generalized parton distributions through the analysis of the world electron scattering data considering two-photon exchange corrections
• Revealing nucleon and nucleus flickering in pA collisions at the LHC
• Nucleon spin decomposition with one dynamical gluon
• The exclusive limit of the pion-induced Drell-Yan process
• Electromagnetic properties of the nucleon and the Roper resonance in soft-wall AdS/QCD at finite temperature
• Extraction of beam-spin asymmetries from the hard exclusive ${\pi }^{+}$ channel off protons in a wide range of kinematics
• Exclusive photoproduction of ${\pi }^0$ up to large values of Mandelstam variables $s,t$ and $u$ with CLAS
• Gluon parton densities in soft-wall AdS/QCD
• Constraining nucleon strangeness
• Study of kaon structure using the light-cone quark model
• Nucleon axial form factor from generalized parton distributions
• Deep exclusive electroproduction of ${\pi }^0$ at high $Q^2$ in the quark valence regime
• Gluon transversity in polarized proton-deuteron Drell-Yan process
• Form factors and transverse charge and magnetization densities in the hard-wall AdS/QCD model
• Generalized parton distributions in spin-3/2 particles
• NLO corrections to the deeply virtual meson production revisited: impact on the extraction of generalized parton distributions
• Determination of generalized parton distributions through a simultaneous analysis of axial form factor and wide-angle Compton scattering data
• Impact of JLab data on the determination of GPDs at zero skewness and new insights from transition form factors $N\to \Delta$
• Generalized parton distributions in the soft-wall model of AdS/QCD
• Status of DVMP, DVCS and GPDs
• Twist-3 contributions to wide-angle photoproduction of pions
• Deuteron polarizations in the proton-deuteron Drell-Yan process for finding the gluon transversity
• The GPD H-tilde and spin correlations in wide-angle Compton scattering
• Momentum transfer dependence of generalized parton distributions
• Exploring twist-4 chiral-even GPDs in the light-front quark-diquark model
• Nucleon tensor form factors in a relativistic confined quark model
• Double parton correlations in mesons within AdS/QCD soft-wall models: a first comparison with lattice data
• The role of the GPD E in the determination of the parton angular momenta
• Form factors of the nucleon by using the t dependence of parton distribution functions
• Hard exclusive pion leptoproduction
• A Comparative Study of Nucleon Structure in Light-Front Quark Models in AdS/QCD
• Transversity generalized parton distributions in spin-3/2 particles
• Wide-angle photo- and electroproduction of pions to twist-3 accuracy
• Transverse distortion of a relativistic composite system in impact parameter space
• Deeply virtual Compton scattering off Helium nuclei with positron beams
• Features of $\omega$ photoproduction off proton target at backward angles : Role of nucleon Reggeon in $u$-channel with parton contributions
• An analysis of polarized parton distribution functions with nonlinear QCD evolution equations
• Six-dimensional light-front Wigner distributions of the proton
• Electromagnetic and gravitomagnetic structure and radii of nucleons
• Accessing Compton Form Factors at the Electron Ion Collider in China: An Impact study on $\text{Im}\mathcal{E}$
• Flavour structure of the nucleon electromagnetic form factors and transverse charge densities in the chiral quark-soliton model
• Nucleon form factors program with SBS at JLAB
• Nucleon Structure from Basis Light-Front Quantization : Status and Prospects
• Examining the structure functions of nucleons by introducing new Ansatz and their consequences on parton distribution functions in higher approximation
• The exclusive Drell-Yan process and deeply virtual pion production
• Momentum transfer dependence of the hadron GPDs and Compton form factors
• Nucleon Form Factors from GPDs
• GPDs of hadrons and elastic pion-nucleon scattering
• From QCD-Based Descriptions to Direct Fits: A Unified Study of Nucleon Electromagnetic Form Factors
• Determination of the pion generalized parton distributions at zero skewness
• Flavor analysis of nucleon, $\Delta$, and hyperon electromagnetic form factors
• Parametrization of zero-skewness unpolarized GPDs
• Internal structure of exotic hadrons by high-energy exclusive reactions
• Global Analyses of Generalized Parton Distributions with Diverse PDF Inputs
• Light-cone sum rule approach for Baryon form factors
• Exclusive Hard Processes for Studying Hadron Structures at J-PARC
• Momentum transfer dependence of gpds
• Electromagnetic and gravitomagnetic structure of pions and pion-nucleon scattering
• Exotic-Hadron Signature by Constituent-Counting Rule in Perturbative QCD
• From form factors to generalized parton distributions