Year: 2009
Type: article
Abstract: We present a Poincar\'e covariant Faddeev equation, which enables the simultaneous prediction of meson and baryon observables using the leading order in a truncation of the Dyson-Schwinger equations that can systematically be improved. The solution describes a nucleon's dressed-quark core. The evolution of the nucleon mass with current-quark mass is discussed. A nucleon-photon current, which can produce nucleon form factors with realistic ${Q}^{2}$ evolution, is described. Axial-vector diquark correlations lead to a neutron Dirac form factor that is negative, with ${r}_{1}^{\mathit{nu}}>{r}_{1}^{\mathit{nd}}$. The proton electric-magnetic form factor ratio falls with increasing ${Q}^{2}$.
Source: Physical Review C
Institutions: Argonne National Laboratory, University of Graz
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1972918262