Mainz 2012 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 39: Hadronenstruktur und -spektroskopie
HK 39.8: Talk
Thursday, March 22, 2012, 18:30–18:45, RW 2
Results for the K0Σ+ photoproduction off the proton in the energy range from threshold to 2250 MeV — •O. Jahn — Physikalisches Institut, Nussallee 12, Bonn
The reaction γ + p → K0 + Σ+ is studied in the photon energy range from threshold to 2250 MeV at the electron accelerator facility ELSA, Bonn. The differential cross section shows increasing forward-peaking with rising photon energy up to K* threshold exhibiting a sudden flattening and drop by a factor of four above this threshold. This results in a pronounced structure in the total cross section which may hint to a change from t-channel exchange below K* threshold to an s-channel mechanism above this threshold. In addition, results for the photon beam asymmetry Σ and the recoil polarization P are presented and discussed. Gefördert durch die / supported by the DFG (SFB/TR-16)