Photoproduction of positive pions from hydrogen at large angles in the energy range 0.3–2.0 GeV

Autor: W. Niehaus, F. Takasaki, E.J. Durwen, H. Fischer, H.-W. Dannhausen, M. Leneke
Rok vydání: 2001
Předmět:
Zdroj: The European Physical Journal A. 11:441-455
ISSN: 1434-601X
1434-6001
DOI: 10.1007/s100500170056
Popis: The differential cross-section for the reaction γp↦π + n was measured using the bremsstrahlung beam of the Bonn 2.5 GeV electron synchrotron. The pions were detected and momentum analysed in a multichannel magnet spectrometer. Data reduction resulted in 1278 measured cross-sections which are presented as energy distributions at six laboratory angles between 180° and 95°. The range of laboratory photon energies extended from 0.3 to 2.1 GeV. The statistical accuracy is better than 3 percent, the systematic error is about 5 percent. The data are compared with other experimental results and predictions of a phenomenological analysis. These cross-sections are the result of a measurement program which was started in the seventies. Further results will be reported in forthcoming publications.
Databáze: OpenAIRE
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