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 struct...

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Veröffentlicht in:	Physical review letters 2005-01, Vol.94 (1), p.012003-012003
Hauptverfasser:	Bartholomy, O, Credé, V, van Pee, H, Anisovich, A V, Anton, G, Bantes, R, Beloglazov, Yu, Bogendörfer, R, Castelijns, R, Ehmanns, A, Ernst, J, Fabry, I, Flemming, H, Fösel, A, Freiesleben, H, Fuchs, M, Funke, Ch, Gothe, R, Gridnev, A, Gutz, E, Höffgen, S K, Horn, I, Hössl, J, Joosten, R, Junkersfeld, J, Kalinowsky, H, Klein, F, Klempt, E, Koch, H, Konrad, M, Kopf, B, Krusche, B, Langheinrich, J, Löhner, H, Lopatin, I, Lotz, J, Matthäy, H, Menze, D, Messchendorp, J, Morales, C, Novinski, D, Ostrick, M, Radkov, A, Reinnarth, J, Sarantsev, A V, Schadmand, S, Schmidt, Ch, Schmieden, H, Schoch, B, Suft, G, Sumachev, V, Szczepanek, T, Thoma, U, Walther, D, Weinheimer, Ch
Format:	Artikel
Sprache:	eng
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Zusammenfassung:	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.
ISSN:	0031-9007