Measurement of the vector analyzing power of the reaction at intermediate energies at ANKE/COSY

The reaction where {pp}s is a proton pair with an excitation energy Epp < 3 MeV, has been observed with the ANKE spectrometer at COSY-Jülich using a polarized beam with energies 353, 500, 550 and 700 MeV. The data have been processed to obtain the vector analyzing power Ay of the reaction. The se...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 295; no. 1; p. 012079
Main Author Tsirkov, D
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.05.2011
Subjects
Beams (radiation)
Chiral dynamics
Perturbation theory
Physics
Pions
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Summary:The reaction where {pp}s is a proton pair with an excitation energy Epp < 3 MeV, has been observed with the ANKE spectrometer at COSY-Jülich using a polarized beam with energies 353, 500, 550 and 700 MeV. The data have been processed to obtain the vector analyzing power Ay of the reaction. The setup acceptance covers most of the angular range at 353 MeV and forward angles at the higher beam energies, allowing one to obtain the Ay angular dependence. From the results of the analysis at 353 MeV, one can extract information on the pion d-wave contribution, which is important for Chiral Perturbation Theory tests at this energy. At higher energies the results are compared with a phenomenological model and this gives additional information about Δ-nucleon dynamics.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/295/1/012079