Baryons as relativistic three-quark bound states
By G. Eichmann, H. Sanchis-Alepuz, Richard Williams, R. Alkofer, C. Fischer. 2016
410 citations recorded by the source corpus.
We review the spectrum and electromagnetic properties of baryons described as relativistic three-quark bound states within QCD. The composite nature of baryons results in a rich excitation spectrum, whilst leading to highly non-trivial structural properties explored by the coupling to external (electromagnetic and other) currents. Both present many unsolved problems despite decades of experimental and theoretical research. We discuss the progress in these fields from a theoretical perspective, focusing on nonperturbative QCD as encoded in the functional approach via Dyson-Schwinger and Bethe-Salpeter equations. We give a systematic overview as to how results are obtained in this framework and explain technical connections to lattice QCD. We also discuss the mutual relations to the quark model, which still serves as a reference to distinguish 'expected' from 'unexpected' physics. We confront recent results on the spectrum of non-strange and strange baryons, their form factors and the issues of two-photon processes and Compton scattering determined in the Dyson-Schwinger framework with those of lattice QCD and the available experimental data. The general aim is to identify the underlying physical mechanisms behind the plethora of observable phenomena in terms of the underlying quark and gluon degrees of freedom.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/dd10607518a8246339c8d0383f28a8991240223a
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Nuclear and High Energy Physics
Citations in the corpus
- QCD at finite temperature and chemical potential from Dyson–Schwinger equations (2018, background): “Many more details can be found in a number of review articles focusing on different aspects [15, 178, 193, 268–270, 300–306].”
- The nonperturbative functional renormalization group and its applications (2020, neutral): “tetraquarks, for a recent review see [849].”
- Nonperturbative properties of Yang–Mills theories (2018, result): “[21, 22] for recent reviews, but also results directly from calculated correlation functions were obtained, e.”