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Hadrons and Nuclei


Eur. Phys. J. A 14, 477-489 (2002)
DOI: 10.1140/epja/i2002-10009-9

Electroweak form factors of non-strange baryons

D. Merten, U. Löring, K. Kretzschmar, B. Metsch and H.-R. Petry

Institut für Theoretische Kernphysik, Nußallee 14-16, D-53115 Bonn, Germany

merten@itkp.uni-bonn.de

(Received: 4 April 2002 Communicated by V.V. Anisovich)

Abstract
We compute electroweak form factors of the nucleon and photon transition form factors of non-strange baryon resonances up to the third resonance region in a model with instanton-induced interaction. The calculation is based on the Bethe-Salpeter equation for three light constituent quarks and is fully relativistic (U. Löring et al., Eur. Phys. J. A 10, 309 (2001)). Static nucleon properties and photon resonance couplings are in good agreement with experiment and the Q2 behaviour of the experimentally known form factors up to large momentum transfer is accounted for.

PACS
11.10.St - Bound and unstable states; Bethe-Salpeter equations.
12.39.Ki - Relativistic quark model.
13.40.Gp - Electromagnetic form factors.

© Società Italiana di Fisica, Springer-Verlag 2002