Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Photoproduction of pi-mesons off protons from the Delta(1232) region to Egamma = 3 GeV

 
: Pee, H. van; Bartholomy, O.; Crede, V.; Anisovich, A.V.; Anton, G.; Bantes, B.; Beloglazov, A.; Bogendörfer, R.; Castelijns, R.; Ehmanns, A.; Ernst, J.; Fabry, I.; Flemming, H.; Foesel, A.; Fuchs, M.; Funke, C.; Gothe, R.; Gridnev, A.B.; Gutz, E.; Höffgen, Stefan; Horn, I.; Hössl, J.; Junkersfeld, J.; Kalinowsky, H.; Klein, F.; Klempt, E.; Koch, H.; Konrad, M.; Kopf, B.; Krusche, B.; Langheinrich, J.; Löhner, H.; Lopatin, I.V.; Lotz, J.; Matthaey, H.; Menze, D.; Messchendorp, J.G.; Nikonov, V.A.; Novinski, D.V.; Ostrick, M.; Radkov, A.; Sarantsev, A.V.; Schadmand, S.; Schmidt, C.; Schmieden, H.; Schoch, B.; Suft, G.; Sumachev, V.; Szczepanek, T.; Thoma, U.; Walther, D.; Weinheimer, C.

:
Volltext ()

The European physical journal. A, Hadrons and nuclei 31 (2007), Nr.1, S.61-77
ISSN: 1434-6001
ISSN: 1434-601X
ISSN: 1431-5831
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer INT ()

Abstract
Photoproduction of pi0-mesons was studied with the crystal-Barrel detector at ELSA for incident energies from 300 MeV to 3 GeV. Differential cross-sections dsigma/ domega, dsigma/ dt, and the cross-section are presented. For Egamma < 3GeV, the angular distributions agree well with the SAID parametrization. At photon energies above 1.5GeV, a strong forward peaking indicates t-channel exchange to be the dominant process. The rapid variations of the cross-section with energy and angle indicate production of resonances. An interpretation of the data within the Bonn-Gatchina partial-wave analysis is briefly discussed.

: http://publica.fraunhofer.de/dokumente/N-190980.html