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 Q^2-evolution, is described. Axial-vector diquark correlations lead to a neutron Dirac form factor that is negative, with r_1^{nu}>r_1^{nd}. The proton electric-magnetic form factor ratio falls with increasing Q^2.

5 pages, 4 figures, 1 table

References in corpus (7)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Hadron Properties and Dyson-Schwinger Equations
• Perspective on rainbow-ladder truncation
• Hadronic unquenching effects in the quark propagator
• Updated dispersion-theoretical analysis of the nucleon electromagnetic form factors
• A covariant view on the nucleons' quark core
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