Delta and Omega electromagnetic form factors in a three-body covariant Bethe-Salpeter approach

Abstract

The electromagnetic form factors of the Delta and Omega baryons are calculated in the framework of Poincare-covariant bound-state equations. The quark-quark interaction is truncated to a single dressed-gluon exchange where for the dressings we use two different models and compare the results. The calculation predicts an oblate shape for the electric charge distribution and a prolate shape for the magnetic dipole distribution. We also identify the necessity of including pion-cloud corrections at low photon-momentum transfer.

12 pages, 6 figures. Submitted to Phys.Rev.D

References in corpus (19)

• Sketching the Bethe-Salpeter kernel
• The quark-gluon vertex in Landau gauge QCD: Its role in dynamical chiral symmetry breaking and quark confinement
• Vector meson form factors and their quark-mass dependence
• Nucleon electromagnetic form factors from the covariant Faddeev equation
• Perspective on rainbow-ladder truncation
• Beyond the rainbow: effects from pion back-coupling
• Hadronic unquenching effects in the quark propagator
• Electromagnetic structure of the lowest-lying decuplet resonances in covariant chiral perturbation theory
• Delta and Omega masses in a three-quark covariant Faddeev approach
• Delta and Omega electromagnetic form factors in a Dyson-Schwinger/Bethe-Salpeter approach
• U_A(1) anomaly and eta' mass from an infrared singular quark-gluon vertex
• The nucleon and Delta(1232) form factors at low momentum-transfer and small pion masses
• Electromagnetic properties of the Delta(1232) and decuplet baryons in the self-consistent SU(3) chiral quark-soliton model
• Extracting the Omega- electric quadrupole moment from lattice QCD data
• Magnetic Dipole, Electric Quadrupole and Magnetic Octupole Moments of the $\Delta$ Baryons in Light Cone QCD Sum Rules
• Electromagnetic form factors of the Delta in a S-wave approach
• The shape of the $\Delta$ baryon in a covariant spectator quark model
• Delta properties in the rainbow-ladder truncation of Dyson-Schwinger equations
• The Pion Cloud: Insights into Hadron Structure

Cited by in corpus (33)

• QCD and strongly coupled gauge theories: challenges and perspectives
• Baryons as relativistic three-quark bound states
• Light mesons in QCD and unquenching effects from the 3PI effective action
• Nucleon and $\Delta$ elastic and transition form factors
• The quark-gluon vertex in Landau gauge bound-state studies
• Spectra of heavy quarkonia in a Bethe-Salpeter-equation approach
• On light baryons and their excitations
• First Measurements of Timelike Form Factors of the Hyperons, Lambda0, Sigma0, Sigma+, Xi0, Xi-, and Omega-, and Evidence of Diquark Correlations
• Pion cloud effects on baryon masses
• Elastic and transition form factors of the Δ(1232)
• Quark-gluon vertex from the Landau gauge Curci-Ferrari model
• 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
• Electromagnetic transition form factors of baryons in the space-like momentum region
• On the effect of resonances in the quark-photon vertex
• First look at heavy-light mesons with a dressed quark-gluon vertex
• Quark scalar, axial, and pseudoscalar charges in the Schwinger-Dyson formalism
• Electromagnetic form factors of the baryon decuplet with flavor SU(3) symmetry breaking
• Hyperon elastic electromagnetic form factors in the space-like momentum region
• Electromagnetic form factors of the ${\Omega }^{-}$ baryon in the spacelike and timelike regions
• Baryon transition form factors at the pole
• Light-quarkonium spectra and orbital-angular-momentum decomposition in a Bethe-Salpeter-equation approach
• Dirac form factors and electric charge radii of baryons in the combined chiral and 1/N_c expansions
• Hadronic bound-states in SU(2) from Dyson--Schwinger Equations
• Charming quasi-exotic open-flavor mesons
• Electromagnetic baryon form factors in the Poincare-covariant Faddeev approach
• A comprehensive approach to the physics of mesons
• On the low-energy spectrum of an SU(2) gauge theory with dynamical fermions
• Elucidating the rho-meson's role as intermediate resonance in the time-like electromagnetic pion form factor
• Baryons with functional methods
• Delta and Omega electromagnetic form factors in a covariant three-body approach
• Baryonic form factors of light pseudoscalar mesons