Explanation and Prediction of Observables using Continuum Strong QCD

Abstract

The last five years have brought considerable progress in the study of the bound-state problem in continuum quantum field theory. We highlight a subset of that progress; viz., that made within the context of Dyson Schwinger equation analyses of cold, sparse hadrons. Our focus is primarily on advances in the reliable computation, explanation and prediction of quantities that are truly measurable; but we also review aspects of a new paradigm that has condensates contained within hadrons, and explain that the asymptotic form of parton distribution amplitudes and functions are practically unreachable with terrestrial facilities. Given the pace of expansion in experiment and improvement in theory, it appears possible that the next five years will bring profound growth in our store of knowledge about hadrons and nuclei.

103 pages, 34 figures. Accepted for publication in "Progress in Particle and Nuclear Physics"

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• Hadron Properties and Dyson-Schwinger Equations
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• Pion and kaon valence-quark parton distribution functions
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• Flavor Asymmetry of the Nucleon Sea and the Five-Quark Components of the Nucleons
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• Unquenching effects in the quark and gluon propagator
• Mind the gap
• Pion in the Holographic Model with 5D Yang-Mills Fields
• Hadron Physics and the Dyson--Schwinger Equations of QCD
• Extraction of Electromagnetic Transition Form Factors for Nucleon Resonances within a Dynamical Coupled-Channels Model
• Neutron Structure Functions
• Gluon mass generation in the massless bound-state formalism
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• Pion-induced Drell-Yan processes and the flavor-dependent EMC effect
• Polarized structure functions of nucleons and nuclei
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