Darmstadt 2008 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 34: Postersitzung

HK 34.12: Poster

Thursday, March 13, 2008, 14:00–16:00, Poster C3

The beam asymmetry Σ in the channel γ^→p → p π⁰ π⁰ measured with the CBELSA/TAPS experiment — •Vahe Sokhoyan for the CBELSA/TAPS collaboration — Nußallee 14-16, D-53115 Bonn

Single meson as well as double meson photoproduction play an important role in baryon spectroscopy. To unambiguously identify baryon resonances in photoproduction experiments the measurement of polarization observables in addition to the determination of differential cross sections is of big importance. In the talk we will present new data on the reaction γ^→p → p π⁰ π⁰, covering the third resonance region. The measurement has been performed with the CBELSA/TAPS experiment at the electron accelerator ELSA in Bonn, using linearly polarized photons, produced at a diamond radiator by coherent bremsstrahlung. New results on the measured beam asymmetry Σ in the energy interval 970−1650 MeV will be discussed.

Supported by the DFG (SFB/TR16)