Meson and nucleon properties from Dyson-Schwinger QCD

Details Meson and nucleon properties from Dyson-Schwinger QCD Meson and nucleon properties from Dyson-Schwinger QCD

2008-12-17

arxiv.org/abs/0812.3183v1

PoS Confinement8:077,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 2 figures; talk given at the 8th Conference "Quark Confinement and the Hadron Spectrum", Mainz, Germany, September 1-

Scientific paper

We present selected results from a calculation of meson and nucleon observables in a Green-function 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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