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Photoproduction of πmesons off protons from the Δ(1232) region to Eγ = 3 GeV |
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| Authors: | H. van Pee O. Bartholomy V. Crede A. V. Anisovich G. Anton R. Bantes Yu. Beloglazov R. Bogendörfer R. Castelijns A. Ehmanns J. Ernst I. Fabry H. Flemming A. Fösel M. Fuchs Ch. Funke R. Gothe A. Gridnev E. Gutz St. Höffgen I. Horn J. Hößl J. Junkersfeld H. Kalinowsky F. Klein E. Klempt H. Koch M. Konrad B. Kopf B. Krusche J. Langheinrich H. Löhner I. Lopatin J. Lotz H. Matthäy D. Menze J. Messchendorp V. A. Nikonov D. Novinski M. Ostrick A. Radkov A. V. Sarantsev S. Schadmand C. Schmidt H. Schmieden B. Schoch G. Suft V. Sumachev T. Szczepanek U. Thoma D. Walther Ch. Weinheimer |
| Affiliation: | 1. Helmholtz-Institut für Strahlen- und Kernphysik, Universit?t Bonn, Germany 2. Department of Physics, Florida State University, Tallahassee, FL, USA 3. Petersburg Nuclear Physics Institute, Gatchina, Russia 4. Physikalisches Institut, Universit?t Erlangen, Germany 5. Physikalisches Institut, Universit?t Bonn, Germany 6. Kernfysisch Versneller Instituut, Groningen, The Netherlands 7. Institut für Experimentalphysik I, Universit?t Bochum, Germany 8. Institut für Physik, Universit?t Basel, Switzerland 9. II. Physikalisches Institut, Universit?t Gie?en, Germany |
| Abstract: | Photoproduction of π0-mesons was studied with the Crystal-Barrel detector at ELSA for incident energies from 300MeV to 3GeV. Differential cross-sections dσ/dΩ, dσ/dt, and the total cross-section are presented. For E γ < 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. |
| Keywords: | 13.30.-a Decays of baryons 13.60.Le Meson production 14.20.Gk Baryon resonances with S = 0 |
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