Journal
FEW-BODY SYSTEMS
Volume 51, Issue 1, Pages 1-25Publisher
SPRINGER WIEN
DOI: 10.1007/s00601-011-0225-x
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Funding
- Forschungszentrum Julich GmbH
- U. S. Department of Energy, Office of Nuclear Physics [DE-FG03-97ER4014, DE-AC02-06CH11357]
- Department of Energy's Science Undergraduate Laboratory
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We present the first Dyson-Schwinger equation calculation of the light hadron spectrum that simultaneously correlates the masses of meson and baryon ground- and excited-states within a single framework. At the core of our analysis is a symmetry-preserving treatment of a vector-vector contact interaction. In comparison with relevant quantities the root-mean-square-relative-error/degree-of freedom is 13%. Notable amongst our results is agreement between the computed baryon masses and the bare masses employed in modern dynamical coupled-channels models of pion-nucleon reactions. Our analysis provides insight into numerous aspects of baryon structure; e.g., relationships between the nucleon and Delta masses and those of the dressed-quark and diquark correlations they contain.
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