Three Lectures on Hadron Physics

Abstract

These lectures explain that comparisons between experiment and theory can expose the impact of running couplings and masses on hadron observables and thereby aid materially in charting the momentum dependence of the interaction that underlies strong-interaction dynamics. The series begins with a primer on continuum QCD, which introduces some of the basic ideas necessary in order to understand the use of Schwinger functions as a nonperturbative tool in hadron physics. It continues with a discussion of confinement and dynamical symmetry breaking (DCSB) in the Standard Model, and the impact of these phenomena on our understanding of condensates, the parton structure of hadrons, and the pion electromagnetic form factor. The final lecture treats the problem of grand unification; namely, the contemporary use of Schwinger functions as a symmetry-preserving tool for the unified explanation and prediction of the properties of both mesons and baryons. It reveals that DCSB drives the formation of diquark clusters in baryons and sketches a picture of baryons as bound-states with Borromean character. Planned experiments are capable of validating the perspectives outlined in these lectures.

53 pages, 17 figures. Summary of three lectures delivered at "Hadron Physics XIII - XIII International Workshop on Hadron Physics", 22-27 March 2015, Hotel do Bosque, Angra dos Reis - RJ, Brazil

References in corpus (40)

• Big-Bang Nucleosynthesis
• Gluon and ghost propagators in the Landau gauge: Deriving lattice results from Schwinger-Dyson equations
• Hadronic Spectra and Light-Front Wavefunctions in Holographic QCD
• Electromagnetic excitation of the Delta(1232)-resonance
• Determination of the Charged Pion Form Factor at Q2=1.60 and 2.45 (GeV/c)2
• Charged pion form factor between Q^2=0.60 and 2.45 GeV^2. II. Determination of, and results for, the pion form factor
• Sketching the Bethe-Salpeter kernel
• A new parameterization of the nucleon elastic form factors
• Bridging a gap between continuum-QCD and ab initio predictions of hadron observables
• Soft-Gluon Resummation and the Valence Parton Distribution Function of the Pion
• Distribution Functions of the Nucleon and Pion in the Valence Region
• Non-perturbative comparison of QCD effective charges
• Dressed-quark anomalous magnetic moments
• Abelian anomaly and neutral pion production
• Moments of pseudoscalar meson distribution amplitudes from the lattice
• pi- and rho-mesons, and their diquark partners, from a contact interaction
• 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
• Nucleon electromagnetic form factors from the covariant Faddeev equation
• Pion form factor from a contact interaction
• Maximum Wavelength of Confined Quarks and Gluons and Properties of Quantum Chromodynamics
• Completing the picture of the Roper resonance
• Evidence for diquarks in lattice QCD
• Masses of ground and excited-state hadrons
• Basic features of the pion valence-quark distribution function
• Perspective on rainbow-ladder truncation
• Pion and kaon valence-quark parton distribution functions
• Role of diquark correlations and the pion cloud in nucleon elastic form factors
• Flavour symmetry breaking and meson masses
• Parton distribution amplitudes of light vector mesons
• Nucleon tensor charges and electric dipole moments
• Delta and Omega electromagnetic form factors in a Dyson-Schwinger/Bethe-Salpeter approach
• Understanding the nucleon as a Borromean bound-state
• Hadron Physics and the Dyson--Schwinger Equations of QCD
• Diquark correlations in baryons on the lattice with overlap quarks
• A covariant study of tensor mesons
• The Gluon Propagator with Two-loop Schwinger-Dyson Equations
• Polarized structure functions of nucleons and nuclei
• Transverse Ward-Takahashi Relation for the Fermion-Boson Vertex Function in 4-dimensional QED
• Gravity and its Mysteries: Some Thoughts and Speculations

Cited by in corpus (42)

• Electron-Ion Collider in China
• Diquark Correlations in Hadron Physics: Origin, Impact and Evidence
• Spectrum of light- and heavy-baryons
• Revealing the structure of light pseudoscalar mesons at the Electron-Ion Collider
• Masses of ground-state mesons and baryons, including those with heavy quarks
• Perspective on the origin of hadron masses
• Empirical Consequences of Emergent Mass
• Selected Science Opportunities for the EicC
• Brout-Englert-Higgs physics: From foundations to phenomenology
• Discretization effects on renormalized gauge-field Green's functions, scale setting and gluon mass
• ${\gamma }^{\ast }\gamma \to \eta ,{\eta }^{\prime }$ transition form factors
• Partonic structure of neutral pseudoscalars via two photon transition form factors
• Reflections upon the Emergence of Hadronic Mass
• Poincaré-covariant analysis of heavy-quark baryons
• Resolving the Bethe-Salpeter kernel
• Higgs modulation of emergent mass as revealed in kaon and pion parton distributions
• Strong QCD Insights from Excited Nucleon Structure Studies with CLAS and CLAS12
• Parity partners in the baryon resonance spectrum
• Nucleon elastic form factors at accessible large spacelike momenta
• Off-shell persistence of composite pions and kaons
• Proton tensor charges from a Poincaré-covariant Faddeev equation
• Dissecting nucleon transition electromagnetic form factors
• Distribution amplitudes of radially-excited pi- and K-mesons
• Measurements of $ep\to e^{\prime }{\pi }^{+}{\pi }^{-}{p}^{\prime }$ Cross Sections with CLAS at $1.40<W<2.0$ GeV and $2.0<Q^2<5.0$ GeV${}^2$
• Transition form factors: ${\gamma }^{\ast }+p\to \Delta (1232)$, $\Delta (1600)$
• Spectrum and structure of octet and decuplet baryons and their positive-parity excitations
• N* Structure and Strong QCD
• Nucleon Resonance Structure from Exclusive Meson Electroproduction with CLAS
• Leading-twist distribution amplitudes of scalar- and vector-mesons
• Vector-Interaction-Enhanced Bag Model
• Quark fragmentation as a probe of dynamical mass generation
• Baryons and the Borromeo
• Impact of the Nuclear Equation of State on the Stability of Hybrid Neutron Stars
• Emergent phenomena and partonic structure in hadrons
• The quenched SU(2) fundamental scalar propagator in minimal Landau gauge
• Recent selected theory developments for NICA
• The quenched SU(2) adjoint scalar propagator in minimal Landau gauge
• The quenched SU(2) scalar-gluon vertex in minimal Landau gauge
• Quark Propagator with electroweak interactions in the Dyson-Schwinger approach
• Lectures on Bound states
• Influence of broken flavor and C and P symmetry on the quark propagator
• Symmetry breaking effects in pion couplings to constituent quark currents