Electroweak form factors of non-strange baryons

Merten, Dirk; Loering, Ulrich; Kretzschmar, Klaus; Metsch, Bernard; Petry, Herbert-R.

Electroweak form factors of non-strange baryons

Authors

Description

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 {\it et al.}, Eur. Phys. J. {\bf A10}, 309 (2001)). Static nucleon properties and photon resonance couplings are in good agreement with experiment and the $Q^2$-behaviour of the experimentally known form factors up to large momentum transfer is accounted for.
12 pages, 17 figures, submitted to Eur. Phys. J. A