Delta and Omega electromagnetic form factors in a Dyson-Schwinger/Bethe-Salpeter approach

Abstract

We investigate the electromagnetic form factors of the Delta and the Omega baryons within the Poincare-covariant framework of Dyson-Schwinger and Bethe-Salpeter equations. The three-quark core contributions of the form factors are evaluated by employing a quark-diquark approximation. We use a consistent setup for the quark-gluon dressing, the quark-quark bound-state kernel and the quark-photon interaction. Our predictions for the multipole form factors are compatible with available experimental data and quark-model estimates. The current-quark mass evolution of the static electromagnetic properties agrees with results provided by lattice calculations.

16 pages, 7 figures, 1 table, added references

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• Spin Zero Glueballs in the Bethe-Salpeter Formalism
• Matrix algorithms for solving (in)homogeneous bound state equations
• Octet and Decuplet masses: a covariant three-body Faddeev calculation
• Elucidating the effect of intermediate resonances in the quark interaction kernel on the time-like electromagnetic pion form factor
• Electromagnetic Transition Form Factors of Baryon Resonances
• Extracting the Omega- electric quadrupole moment from lattice QCD data
• The shape of the $\Delta$ baryon in a covariant spectator quark model
• Electromagnetic form factors of the baryon decuplet with flavor SU(3) symmetry breaking
• Electromagnetic form factors of the ${\Omega }^{-}$ baryon in the spacelike and timelike regions
• Delta properties in the rainbow-ladder truncation of Dyson-Schwinger equations
• The time-like electromagnetic kaon form factor
• Nucleon form factors and parton distributions in nonlocal chiral effective theory
• Hadronic bound-states in SU(2) from Dyson--Schwinger Equations
• Space-like Electromagnetic Form Factors of Lambda- and Sigma-Baryons from Quark-Diquark Faddeev Equations
• $\Delta$-baryon axialvector and pseudoscalar form factors, and associated PCAC relations
• Electromagnetic baryon form factors in the Poincare-covariant Faddeev approach
• Elucidating the rho-meson's role as intermediate resonance in the time-like electromagnetic pion form factor
• Delta and Omega electromagnetic form factors in a covariant three-body approach
• Baryons with functional methods