Exploring the light-quark interaction
Lei Chang, Ian C. Cloet, Bruno El-Bennich, Thomas Klahn, Craig D., Roberts
TL;DR
This paper discusses how upgraded Jefferson Lab experiments combined with Dyson-Schwinger equations can deepen understanding of light-quark confinement, chiral symmetry breaking, and nucleon structure in QCD.
Contribution
It offers a Dyson-Schwinger equation framework to interpret experimental efforts on light-quark interactions and nucleon properties.
Findings
Interpretation of string-breaking phenomena
A symmetry-preserving truncation for mesons
Insights into the neutron's charge distribution
Abstract
Two basic motivations for an upgraded JLab facility are the needs: to determine the essential nature of light-quark confinement and dynamical chiral symmetry breaking (DCSB); and to understand nucleon structure and spectroscopy in terms of QCD's elementary degrees of freedom. During the next ten years a programme of experiment and theory will be conducted that can address these questions. We present a Dyson-Schwinger equation perspective on this effort with numerous illustrations, amongst them: an interpretation of string-breaking; a symmetry-preserving truncation for mesons; the nucleon's strangeness sigma-term; and the neutron's charge distribution.
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