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

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 consis...

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Bibliographic Details
Published in:Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2010-12, Vol.82 (11), Article 114017
Main Authors: Nicmorus, D., Eichmann, G., Alkofer, R.
Format: Article
Language:English
Subjects:
BETHE-SALPETER EQUATION
BOUND STATE
ELECTROMAGNETIC FORM FACTORS
FORM FACTORS
KERNELS
MULTIPOLES
OMEGA BARYONS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
QUARK MODEL
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Summary: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.
ISSN:1550-7998
1550-2368
DOI:10.1103/PhysRevD.82.114017