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HK: Physik der Hadronen und Kerne

HK 6: Theory II

HK 6.6: Talk

Monday, March 8, 2004, 17:30–17:45, E

Static properties of baryons in the Bethe-Salpter framework — •Christian Haupt, Ulrich Löring, Bernard Metsch, and Herbert-R. Petry — Helmholtz-Institut für Strahlen- und Kernphysik, Abteilung Theorie, Nußallee 14-16, D-53115 Bonn

We derive a method, to compute static properties (e. g. magnetic moments and charge radii) of baryons from the Bethe-Salpeter equation in the instantaneous approximation. This is usually done by taking the limit of some form factor. We develop instead a new approach, which expresses the static moments as expectation values of appropriate operators with respect to Salpeter amplitudes.

We discuss the analytic derivation of these expecation values, show the numerical results and compare them to experiment.