Polarization Observables T and F in single [pi] super(0)- and [eta]- Photoproduction off quasi-free Nucleons

• Published in: EPJ Web of conferences Vol. 81; pp. 1 - 4
• Main Author: Strub, Thomas
• Format: Journal Article
• Language: English
• Published: 01.01.2014
• Subjects: Asymmetry; Bremsstrahlung; Crystals; Microtrons; Nucleons; Photons; Photoproduction; Polarization
• DOI: 10.1051/epjconf/20148102021
• ISSN: 2100-014X

Meson photoproduction has developed into a powerful tool to study the nucleon excitation spectrum and test effective quark models which operate in the nonperturbative regime of QCD. An insight into the J super(P) configurations and isospin decompositions of the contributing resonances is gained by measuring a minimal set of polarization observables on both the proton and the neutron. Single [pi] super(0)- and [eta]-photoproduction off a transversally polarized d-butanol target has been measured with circularly polarized bremsstrahlung photons generated by the MAMI-C electron microtron. With the nearly 4[pi] acceptance of the combined Crystal Ball/TAPS setup the double polarization observable F and the target asymmetry T can be extracted for the first time for polarized, quasi-free neutrons over a wide energy and angular range.