Marius Hilt (Mainz):

Δ(1232) Resonance in Chiral Perturbation Theory

Abstract:

The electromagnetic nucleon to Δ transition form factors are investigated in the framework of manifestly covariant chiral perturbation theory. The calculation includes quantities at one loop level up to chiral order three in the „small scale expansion”. The Δ resonance is included as an explicit degree of freedom. The ρ meson is included in a semi-phenomenological approach at tree level. The momentum dependence of the magnetic dipole, electric quadrupole and Coulomb quadrupole transition form factor is compared to experimental data.

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