Photoproduction of pi0-mesons off protons from the Delta(1232) region to E(gamma) = 3 GeV

Details Photoproduction of pi0-mesons off protons from the Delta(1232) region to E(gamma) = 3 GeV Photoproduction of pi0-mesons off protons from the Delta(1232) region to E(gamma) = 3 GeV

2007-04-13

arxiv.org/abs/0704.1776v1

Eur.Phys.J.A31:61-77,2007

Physics

Nuclear Physics

Nuclear Experiment

17 pages, 17 figures

Scientific paper

10.1140/epja/i2006-10160-3

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 d sigma /d Omega, d sigma/d t, and the total cross section are presented. For E(gamma) < 3 GeV, the angular distributions agree well with the SAID parametrization. At photon energies above 1.5 GeV, 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.

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