On unifying the description of meson and baryon properties
Abstract
A Poincare' covariant Faddeev equation is presented, 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 Q2-evolution, is described. Axial-vector diquark correlations lead to a neutron Dirac form factor that is negative, with r1nu>r1nd. The proton electric-magnetic form factor ratio falls with increasing Q2.
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