Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2004-07-12
Phys.Rev.Lett. 94 (2005) 012003
Physics
High Energy Physics
High Energy Physics - Experiment
LaTeX file, 4 pages, 4 encapsulated postscript figures, submitted to Phys. Rev. Lett. The publication of hep-ex/0407022 is acc
Scientific paper
10.1103/PhysRevLett.94.012003
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.
Bartholomy Olivia
Crede Volker
for the CB-ELSA Collaboration
Pee Harald van
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