Baryon Properties from Continuum-QCD

TL;DR

This paper reviews recent advances in hadron physics using Dyson-Schwinger equations in QCD, highlighting progress in understanding in-hadron condensates, baryon mass correlations, and nucleon form factors, with implications for the cosmological constant and nucleon structure.

Contribution

It introduces a symmetry-preserving computational approach linking meson and baryon properties, addressing the Roper resonance puzzle, and predicts nucleon form factor behaviors emphasizing diquark correlations.

Findings

In-hadron condensates may resolve the cosmological constant problem.

Correlated meson and baryon mass calculations improve understanding of hadron spectra.

Predicted Q^2-dependence of nucleon form factors highlights diquark effects.

Abstract

We provide an inkling of recent progress in hadron physics made using QCD's Dyson-Schwinger equations, reviewing: the notion of in-hadron condensates and a putative solution of a gross problem with the cosmological constant; a symmetry-preserving computation that simultaneously correlates the masses of meson and baryon ground- and excited-states, and contributes to a resolution of the conundrum of the Roper resonance; and a prediction for the Q^2-dependence of u- and d-quark Dirac and Pauli form factors in the proton, which exposes the critical role played by diquark correlations within the nucleon.