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2007
Journal Article
Titel
Photoproduction of pi-mesons off protons from the Delta(1232) region to Egamma = 3 GeV
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.
Author(s)
Crede, V.
Helmholtz-Institut für Strahlen- und Kernphysik der Universität Bonn, Germany / Department of Physics, Florida State University, Tallahassee, FL, USA
Anisovich, A.V.
Helmholtz-Institut für Strahlen- und Kernphysik der Universität Bonn, Germany / Petersburg Nuclear Physics Institute, Gatchina, Russia
Nikonov, V.A.
Helmholtz-Institut für Strahlen- und Kernphysik der Universität Bonn, Germany / Petersburg Nuclear Physics Institute, Gatchina, Russia
Sarantsev, A.V.
Helmholtz-Institut für Strahlen- und Kernphysik der Universität Bonn, Germany / Petersburg Nuclear Physics Institute, Gatchina, Russia
Thoma, U.
Helmholtz-Institut für Strahlen- und Kernphysik der Universität Bonn, Germany / II. Physikalisches Institut, Universität Giessen, Germany