Progress in the calculation of nucleon transition form factors

Abstract

We give a brief account of the Dyson-Schwinger and Faddeev-equation approach and its application to nucleon resonances and their transition form factors. We compare the three-body with the quark-diquark approach and present a quark-diquark calculation for the low-lying nucleon resonances including scalar, axialvector, pseudoscalar and vector diquarks. We also discuss the timelike structure of transition form factors and highlight the advantages of form factors over helicity amplitudes.

8 pages, 8 figures, 2 tables. Proceedings of the ECT* Workshop "Nucleon Resonances: From Photoproduction to High Photon Virtualities", October 12-16, 2015, Trento, Italy

References in corpus (10)

• Big-Bang Nucleosynthesis
• Infrared Properties of QCD from Dyson-Schwinger equations
• Sketching the Bethe-Salpeter kernel
• Light mesons in QCD and unquenching effects from the 3PI effective action
• Nucleon electromagnetic form factors from the covariant Faddeev equation
• Masses of ground and excited-state hadrons
• Delta and Omega electromagnetic form factors in a Dyson-Schwinger/Bethe-Salpeter approach
• Octet and Decuplet masses: a covariant three-body Faddeev calculation
• Hyperon elastic electromagnetic form factors in the space-like momentum region
• Electromagnetic baryon form factors in the Poincare-covariant Faddeev approach

Cited by in corpus (10)

• Baryons as relativistic three-quark bound states
• QCD at finite temperature and chemical potential from Dyson-Schwinger equations
• Spectrum of light- and heavy-baryons
• On light baryons and their excitations
• Structure of the nucleon's low-lying excitations
• Nucleon elastic form factors at accessible large spacelike momenta
• Transition form factors: ${\gamma }^{\ast }+p\to \Delta (1232)$, $\Delta (1600)$
• Baryons and the Borromeo
• Electromagnetic form factors of ${\Lambda }_c$ in the Bethe-Salpeter equation approach
• Baryons with functional methods