Radiative pi0 photoproduction on protons in the Delta+(1232) region

Abstract

The reaction gamma p -> p pi0 gamma' has been measured with the Crystal Ball / TAPS detectors using the energy-tagged photon beam at the electron accelerator facility MAMI-B. Energy and angular differential cross sections for the emitted photon gamma' and angular differential cross sections for the pi0 have been determined with high statistics in the energy range of the Delta+(1232) resonance. Cross sections and the ratio of the cross section to the non-radiative process gamma p -> p pi0 are compared to theoretical reaction models, having the anomalous magnetic moment kappa_Delta+ as free parameter. As the shape of the experimental distributions is not reproduced in detail by the model calculations, currently no extraction of kappa_Delta+ is feasible.

14 pages, 19 figures

References in corpus (4)

• Unitary Isobar Model - MAID2007
• New results on the Roper resonance and the P_{11} partial wave
• Chiral Effective-Field Theory in the Delta(1232) Region: Pion Electroproduction on the Nucleon
• Chiral effective-field theory in the Delta(1232) region: II. radiative pion photoproduction

Cited by in corpus (10)

• Light Baryon Spectroscopy
• Study of the gamma p --> pi0 pi0 p reaction with the Crystal Ball/TAPS at the Mainz
• Photoproduction of pi0pi0 and pi0pi+-pairs off the proton from threshold to the second resonance region
• The BGOOD experimental setup at ELSA
• Measurement of the beam-helicity asymmetry $I^{\odot }$ in the photoproduction of ${\pi }^0{\pi }^{\pm }$-pairs off protons and off neutrons
• Beam normal spin asymmetry for the $ep\to e\Delta (1232)$ process
• Pion photoproduction off nucleons in covariant chiral perturbation theory
• Moravcsik's theorem on complete sets of polarization observables reexamined
• Threshold pion electro- and photoproduction off nucleons in covariant chiral perturbation theory
• Radiative pion photoproduction in covariant chiral perturbation theory