Nucleon quark distributions in a covariant quark-diquark model

Abstract

Spin-dependent and spin-independent quark light-cone momentum distributions and structure functions are calculated for the nucleon. We utilize a modified Nambu-Jona-Lasinio model in which confinement is simulated by eliminating unphysical thresholds for nucleon decay into quarks. The nucleon bound state is obtained by solving the Faddeev equation in the quark-diquark approximation, where both scalar and axial-vector diquark channels are included. We find excellent agreement between our model results and empirical data.

6 pages, 7 figures

References in corpus (5)

• Uncertainties of predictions from parton distributions. I: Theoretical errors
• Precision Measurement of the Neutron Spin Asymmetries and Spin-dependent Structure Functions in the Valence Quark Region
• Precision Measurement of the Neutron Spin Asymmetry $A_1^n$ and Spin-Flavor Decomposition in the Valence Quark Region
• Determination of polarized parton distribution functions and their uncertainties
• Quark distributions in nuclear matter and the EMC effect

Cited by in corpus (57)

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• Nucleon-Nucleon Correlations, Short-lived Excitations, and the Quarks Within
• Explanation and Prediction of Observables using Continuum Strong QCD
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• Nucleon and $\Delta$ elastic and transition form factors
• The Challenge of the EMC Effect: existing data and future directions
• Completing the picture of the Roper resonance
• The Spin Structure of the Nucleon
• EMC and Polarized EMC Effects in Nuclei
• Isovector EMC effect explains the NuTeV anomaly
• The asymptotic behaviour of parton distributions at small and large $x$
• Role of diquark correlations and the pion cloud in nucleon elastic form factors
• Flavour dependence of the pion and kaon form factors and parton distribution functions
• Transversity quark distributions in a covariant quark-diquark model
• Transverse Momentum Dependent Fragmentation and Quark Distribution Functions from the NJL-jet Model
• Nucleon spin structure at very high-x
• Elastic and transition form factors of the Δ(1232)
• Distinguishing Quarks and Gluons in Pion and Kaon PDFs
• Revealing dressed-quarks via the proton's charge distribution
• Parity-violating DIS and the flavour dependence of the EMC effect
• Nucleons, Nuclear Matter and Quark Matter: A unified NJL approach
• Contact-interaction Faddeev equation and, inter alia, proton tensor charges
• The NJL-jet model for quark fragmentation functions
• Insights into the gamma* N -> Delta transition
• Measurements of $d_2^n$ and $A_1^n$: Probing the neutron spin structure
• Precision Measurements of $A_1^n$ in the Deep Inelastic Regime
• Intrinsic Transverse Motion of the Pion's Valence Quarks
• Neutron Properties in the Medium
• Rho meson form factors in a confining Nambu--Jona-Lasinio model
• Small- and large-x nucleon spin structure from a global QCD analysis of polarized Parton Distribution Functions
• Dressed Quark Mass Dependence of Pion and Kaon Form Factors
• Monte Carlo Simulations of Hadronic Fragmentation Functions using NJL-Jet Model
• Charge Symmetry Breaking Effects in Pion and Kaon Structure
• SU(3)-flavour breaking in octet baryon masses and axial couplings
• Baryon Octet Electromagnetic Form Factors in a confining NJL model
• Constraints on the large-x d/u ratio from electron-nucleus scattering at x>1
• Quark spin and orbital angular momentum from proton GPDs
• Massive Neutron Stars with a Color Superconducting Quark Matter Core
• Valence-quark distributions of pions and kaons in a nuclear medium
• Resonant contributions to inclusive nucleon structure functions from exclusive meson electroproduction data
• Nucleon Quark Distribution Functions from the Dyson-Schwinger Equations
• Impact of DCSB and dynamical diquark correlations on proton GPDs
• Polarized structure functions of nucleons and nuclei
• Applications of a nonlinear evolution equation I: the parton distributions in the proton
• Consequences Of Fully Dressing Quark-Gluon Vertex Function With Two-Point Gluon Lines
• Charge Symmetry Breaking in Spin Dependent Parton Distributions and the Bjorken Sum Rule
• Nucleon structure functions and longitudinal spin asymmetries in the chiral quark constituent model
• Nuclear Density Dependence of In-Medium Polarization
• Chiral expansion of moments of quark distributions
• Electromagnetic and Axial-Vector Form Factors of the Quarks and Nucleon
• Intrinsic Glue and Wilson lines within Dressed Quarks
• Examining the EMC Effect using the $F_2^n$ neutron structure function
• Study of Kaon Decay to Two Pions
• Diquark Correlations from Nucleon Charge Radii
• Some recent progress on quark pairings in dense quark and nuclear matter
• Gluon EMC effects in nuclear matter
• Images of the Origin of Mass