Speaker
Prof.
Reinhard Alkofer
(University Graz)
Description
Recent results for the Green's functions of Landau gauge QCD will be used to
formulate a Poincaré-covariant Faddeev approach to baryons. The resulting
three-body amplitudes for a given spin and parity describe the quark core of
the respective baryons. In recent calculations the full three-body problem
has been solved in a framework in which the interaction among quarks is
reduced to a vector-vector interaction via a single dressed-gluon exchange
(Rainbow-Ladder truncation). The formalism allows for the study of the baryon
spectrum as well as their internal properties. In this talk I will focus
on recent results for electromagnetic form factors for nucleons and
spin-3/2 baryons. Their model independent features are assessed using
two different models for the interaction. The results for charge radii
and magnetic moments as a function of the quark current mass provide some
indication what the pion cloud (missing in this calculation but present
in nature) may contribute to baryonic properties.
Primary author
Prof.
Reinhard Alkofer
(University Graz)
Co-authors
Dr
Gernot Eichmann
(University of Giessen)
Dr
Helios Sanchis Alepuz
(U. Gießen)
Dr
Richard Williams
(U. Gießen)
