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Photoproduction of pi⁰ eta on protons and the Delta(1700)D₃₃ resonance

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arxiv 0901.3888 v5 pith:4ZVXKANR submitted 2009-01-25 hep-ex

Photoproduction of pi^0 eta on protons and the Delta(1700)D_{33} resonance

classification hep-ex
keywords gammadeltaresonancedecaymeasuredratioreactionaccelerator
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Total and differential cross sections for the reaction gamma p -> pi^o eta p have been measured with the Crystal Ball/TAPS detector using the tagged photon facility at the MAMI C accelerator in Mainz. In the energy range E_gamma=0.95-1.4 GeV the reaction is dominated by the excitation and sequential decay of the Delta(1700)D33 resonance. Angular distributions measured with high statistics allow us to determine the ratio of hadronic decay widths \Gamma_{\eta \Delta}/\Gamma_{\pi S11} and the ratio of the helicity amplitudes A_{3/2}/A_{1/2} for this resonance.

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