Meson and nucleon properties from Dyson-Schwinger QCD
Abstract
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.
Cite
@article{arxiv.0812.3183,
title = {Meson and nucleon properties from Dyson-Schwinger QCD},
author = {Gernot Eichmann and Reinhard Alkofer and Andreas Krassnigg and Diana Nicmorus},
journal= {arXiv preprint arXiv:0812.3183},
year = {2009}
}
Comments
5 pages, 2 figures; talk given at the 8th Conference "Quark Confinement and the Hadron Spectrum", Mainz, Germany, September 1-6, 2008