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

Author:
Bartholomy, O  Crede, V  van Pee, H  Anisovich, AV  Anton, G  Bantes, R  Beloglazov, Y  Bogendorfer, R  Castelijns, R  Ehmanns, A  Ernst, J  Fabry, I  Flemming, H  Fosel, A  Freiesleben, H  Fuchs, M  Funke, C  Gothe, R  Gridnev, A  Gutz, E  Hoffgen, SK  Horn, I  Hossl, J  Joosten, R  Junkersfeld, J  Kalinowsky, H  Klein, F  Klempt, E  Koch, H  Konrad, M  Kopf, B  Krusche, B  Langheinrich, J  Lohner, H  Lopatin, I  Lotz, J  Matthay, H  Menze, D  Messchendorp, J  Morales, C  Novinski, D  Ostrick, M  Radkov, A  Reinnarth, J  Sarantsev, AV  Schadmand, S  Schmidt, C  Schmieden, H  Schoch, B  Suft, G  Sumachev, V  Szczepanek, T  Thoma, U  Walther, D  Weinheimer, C  


Journal:
PHYSICAL REVIEW LETTERS


Issue Date:
2005


Abstract(summary):

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 similar to98% 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)D(15).


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