Meson and nucleon properties from Dyson-Schwinger QCD


We present selected results from a calculation of meson and nucleon observables in a Greenfunction approach. A rainbow-ladder truncation of QCD’s Dyson-Schwinger equations is used to solve the respective meson, diquark and quark-diquark Bethe-Salpeter equations. It allows for a simultaneous description of meson and nucleon masses and electromagnetic properties from an effective quark-gluon interaction. The results describe a hadronic quark core which agrees with lattice data for heavy quarks whereas pion-cloud effects are missing towards the chiral limit. The neutron’s Dirac form factor is negative due to the presence of axial-vector diquark correlations.

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@inproceedings{Eichmann2008MesonAN, title={Meson and nucleon properties from Dyson-Schwinger QCD}, author={G. Eichmann and Reinhard Alkofer and A. Krassnigg and Diana Nicmorus}, year={2008} }