Neutral-pion photoproduction off protons in the energy range 0.3 GeV<E(gamma)<3 GeV.
Single pi(0) 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 approximately 98% of 4pi. Differential cross sections dsigma/dOmega have been measured. Complicated structures in the angular distributions indicate a variety of different resonances being produced in the s channel intermediate state gammap-->N(*)(Delta(*))-->ppi(0). 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
O
O
Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Nussallee 14-16, D-53115 Bonn, Germany.
Credé
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van Pee
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Anisovich
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Anton
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Bantes
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Beloglazov
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Bogendörfer
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Castelijns
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Ehmanns
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Ernst
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Fabry
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Flemming
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Fösel
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Freiesleben
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Fuchs
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Funke
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Gothe
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Gridnev
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Gutz
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Höffgen
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Horn
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Hössl
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Joosten
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Junkersfeld
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Kalinowsky
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Klein
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Klempt
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Koch
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Konrad
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Kopf
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Krusche
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Langheinrich
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Löhner
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Lopatin
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Lotz
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Matthäy
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Menze
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Messchendorp
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Morales
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Novinski
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Ostrick
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Radkov
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Reinnarth
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Sarantsev
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Schadmand
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Schmidt
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Schmieden
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Schoch
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Suft
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Sumachev
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Szczepanek
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Thoma
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Walther
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Weinheimer
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