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

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 m...

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