Photoproduction of neutral pions has been studied with the CBELSA/TAPS detector in the reaction γp→pπ⁰ for photon energies between 0.85 and 2.50 GeV. The π⁰ mesons are observed in their dominant neutral decay mode: π⁰→γγ. For the first time, the differential cross sections cover the very forward region, θc.m.<60^∘. A partial-wave analysis of these data within the Bonn-Gatchina framework observes the high-mass resonances G₁₇(2190), D₁₃(2080), and D₁₅(2070).
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Credé et al. (2011) studied this question.
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