Interaction model for the gap equation

Abstract

We explain a form for the rainbow-ladder kernel whose momentum-dependence is consonant with modern DSE- and lattice-QCD results, and assess its capability as a tool in hadron physics. In every respect tested, this form produces results for observables that are at least equal to the best otherwise obtained in a comparable approach. Moreover, it enables the natural extraction of a monotonic running-coupling and -gluon-mass.

5 pages, 1 figure, 2 tables

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• Phase diagram and critical endpoint for strongly-interacting quarks
• Hadron Properties and Dyson-Schwinger Equations
• Non-perturbative comparison of QCD effective charges
• pi- and rho-mesons, and their diquark partners, from a contact interaction
• Vector meson form factors and their quark-mass dependence
• Nucleon electromagnetic form factors from the covariant Faddeev equation
• Masses of ground and excited-state hadrons
• Perspective on rainbow-ladder truncation
• Pion and kaon valence-quark parton distribution functions
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• Mind the gap
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