This title appears in the Scientific Report :
2017
Please use the identifier:
http://hdl.handle.net/2128/22779 in citations.
Please use the identifier: http://dx.doi.org/10.1140/epja/i2017-12194-8 in citations.
Double-polarization observable G in neutral-pion photoproduction off the proton
Double-polarization observable G in neutral-pion photoproduction off the proton
This paper reports on a measurement of the double-polarization observable G in π0 photoproduction off the proton using the CBELSA/TAPS experiment at the ELSA accelerator in Bonn. The observable G is determined from reactions of linearly polarized photons with longitudinally polarized protons. The po...
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Please use the identifier: http://dx.doi.org/10.1140/epja/i2017-12194-8 in citations.
This paper reports on a measurement of the double-polarization observable G in π0 photoproduction off the proton using the CBELSA/TAPS experiment at the ELSA accelerator in Bonn. The observable G is determined from reactions of linearly polarized photons with longitudinally polarized protons. The polarized photons are produced by bremsstrahlung off a diamond radiator of well-defined orientation. A frozen spin butanol target provides the polarized protons. The data cover the photon energy range from 617 to 1325 MeV and a wide angular range. The experimental results for G are compared to predictions by the Bonn-Gatchina (BnGa), Jülich-Bonn (JüBo), MAID and SAID partial wave analyses. Implications of the new data for the pion photoproduction multipoles are discussed |