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Neutral pion photoproduction off protons in the energy range 0.3 GeV < E(gamma) < 3 GeV

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arxiv hep-ex/0407022 v2 pith:PT77YCHA submitted 2004-07-12 hep-ex

Olivia Bartholomy , Volker Crede , Harald van Pee (for the CB-ELSA Collaboration) This is my paper · ORCID
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keywords beendatagammaphotoproductionresonancesalonganalysisangle
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Single pi0 photoproduction has been studied with the CB-ELSA experiment at Bonn using tagged photon energies between 0.3 and 3.0 GeV. The experimental setup covers a very large solid angle of about 98% of 4 pi. Differential cross sections (d sigma)/(d Omega) have been measured. Complicated structures in the angular distributions indicate a variety of different resonances being produced in the s channel intermediate state gamma p --> N* (Delta*) --> p pi0. A combined analysis including the data presented in this letter along with other data sets reveals contributions from known resonances and evidence for a new resonance N(2070)D15.

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