Hadron Structure using Continuum Schwinger Function Methods

Abstract

The vast bulk of visible mass emerges from nonperturbative dynamics within quantum chromodynamics (QCD) -- the strong interaction sector of the Standard Model. The past decade has revealed the three pillars that support this emergent hadron mass (EHM); namely, a nonzero gluon mass-scale, a process-independent effective charge, and dressed-quarks with constituent-like masses. Theory is now working to expose their manifold and diverse expressions in hadron observables and highlighting the types of measurements that can be made in order to validate the paradigm. In sketching some of these developments, this discussion stresses the role of EHM in forming nucleon electroweak structure and the wave functions of excited baryons through the generation of dynamical diquark correlations; producing and constraining the dilation of the leading-twist pion distribution amplitude; shaping pion and nucleon parton distribution functions -- valence, glue and sea, including the antisymmetry of antimatter; and moulding pion and proton charge and mass distributions.

arXiv comment24 pages, 11 figures. Invited contribution to a Special Issue of Few Body Systems: "Emergence and Structure of Baryons -- Selected Contributions from the International Conference Baryons 2022''

References in corpus (70)

• Parton distributions from high-precision collider data
• FLAG Review 2019
• New CTEQ global analysis of quantum chromodynamics with high-precision data from the LHC
• pi- and K-meson Bethe-Salpeter Amplitudes
• Measurements of the Meson-Photon Transition Form Factors of Light Pseudoscalar Mesons at Large Momentum Transfer
• Hadronic Spectra and Light-Front Wavefunctions in Holographic QCD
• Pion mass and decay constant
• Baryons as relativistic three-quark bound states
• Improved Measurement of the $\bar{d}/\bar{u}$ Asymmetry in the Nucleon Sea
• Electron-Ion Collider in China
• Pinch Technique: Theory and Applications
• NuSTEC White Paper: Status and Challenges of Neutrino-Nucleus Scattering
• QCD Constrains on the Shape of Polarized Quark and Gluon Distributions
• Measurement of the Charged Pion Electromagnetic Form Factor
• Measurement of gamma gamma* --> pi0 transition form factor at Belle
• Deuterium target data for precision neutrino-nucleus cross sections
• Nucleon mass from a covariant three-quark Faddeev equation
• Insights into the Emergence of Mass from Studies of Pion and Kaon Structure
• The pion: an enigma within the Standard Model
• Process-independent strong running coupling
• Diquark Correlations in Hadron Physics: Origin, Impact and Evidence
• Nucleon and $\Delta$ elastic and transition form factors
• Maximum Wavelength of Confined Quarks and Gluons and Properties of Quantum Chromodynamics
• Light-cone distribution amplitudes of pseudoscalar mesons from lattice QCD
• Structure of the neutral pion and its electromagnetic transition form factor
• Electromagnetic properties of ground and excited state pseudoscalar mesons
• Spectrum of light- and heavy-baryons
• Evidence for intrinsic charm quarks in the proton
• Snowmass 2021 whitepaper: Proton structure at the precision frontier
• Neutrino Interactions with Nucleons and Nuclei: Importance for Long-Baseline Experiments
• Revealing the structure of light pseudoscalar mesons at the Electron-Ion Collider
• The Asymmetry of Antimatter in the Proton
• Generalized Parton Distributions at x->1
• Generalized Pinch Technique and the Background Field Method in General Gauges
• Empirical Consequences of Emergent Mass
• Extracting the sigma-term from low-energy pion-nucleon scattering
• On light baryons and their excitations
• Second Moment of the Pion Light-cone Distribution Amplitude from Lattice QCD
• Selected Science Opportunities for the EicC
• Gluon propagator and three-gluon vertex with dynamical quarks
• Nucleon Axial Radius and Muonic Hydrogen - A New Analysis and Review
• Chiral Effective Field Theory Calculations of Weak Transitions in Light Nuclei
• Comparing antithetic trends of data for the pion-photon transition form factor
• Gauge Sector Dynamics in QCD
• Sigma Terms of Light-Quark Hadrons
• Ward-Green-Takahashi identities and the axial-vector vertex
• Nucleon spin structure at very high-x
• The decay constants ${\mathbf{f}}_{\mathbf{D}}$ and ${\mathbf{f}}_{{\mathbf{D}}_{\mathbf{s}}}$ in the continuum limit of ${\mathbf{N}}_{\mathbf{f}}=2+1$ domain wall lattice QCD
• QCD Running Couplings and Effective Charges
• Emergent Hadron Mass in Strong Dynamics
• Reflections upon the Emergence of Hadronic Mass
• Single Quark Transition Model Analysis of Electromagnetic Nucleon Resonance Transitions in the [70,1-] Supermultiplet
• Mind the gap
• Neutron Structure Function and A=3 Mirror Nuclei
• Concerning pion parton distributions
• Contact-interaction Faddeev equation and, inter alia, proton tensor charges
• Neutron structure function $F_2^n(x)$ from deep inelastic electron scattering off few-nucleon systems
• Emergence of mass in the gauge sector of QCD
• An improved light-cone harmonic oscillator model for the pionic leading-twist distribution amplitude
• Neutron valence structure from nuclear deep inelastic scattering
• Dressed-quarks and the nucleon's axial charge
• Parton distributions of light quarks and antiquarks in the proton
• Studies of N^* structure from the CLAS meson electroproduction data
• Axial form factor of the nucleon at large momentum transfers
• Electromagnetic transition form factors of baryons in the space-like momentum region
• Bethe-Salpeter kernel and properties of strange-quark mesons
• Nucleon axial form factor at large momentum transfers
• Heavy + heavy and heavy + light pseudoscalar to vector semileptonic transitions
• Origin of the Proton Mass
• The European Muon Collaboration effect in Light-Front Hamiltonian Dynamics

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