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Meson and nucleon properties from Dyson-Schwinger QCD | | Gernot Eichmann
; Reinhard Alkofer
; Andreas Krassnigg
; Diana Nicmorus
; | | Date: |
17 Dec 2008 | | 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. | | Source: | arXiv, 0812.3183 | | Services: | Forum | Review | PDF | Favorites | |
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