Journal
PHYSICAL REVIEW D
Volume 94, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.94.094033
Keywords
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Funding
- Erwin Schrodinger Fellowship from the Austrian Science Fund, FWF [J3392-N20]
- Helmholtz International Center for FAIR within the LOEWE program of the State of Hesse
- DFG collaborative research center [TR 16]
- BMBF [05H15RGKBA]
- Austrian Science Fund (FWF) [P29216, J3392] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [P 29216, J 3392] Funding Source: researchfish
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We study ground states and excitations of light octet and decuplet baryons within the framework of Dyson-Schwinger and Faddeev equations. We improve upon similar approaches by explicitly taking into account the momentum-dependent dynamics of the quark-gluon interaction that leads to dynamical chiral symmetry breaking. We perform calculations in both the three-body Faddeev framework and the quarkdiquark approximation in order to assess the impact of the latter on the spectrum. Our results indicate that both approaches agree well with each other. The resulting spectra furthermore agree one-to-one with experiment, provided well-known deficiencies of the rainbow-ladder approximation are compensated for. We also discuss the mass evolution of the Roper and the excited. with varying pion mass and analyze the internal structure in terms of their partial wave decompositions.
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