Differential cross section and vector analysing power of the p {sub pol} p → {pp}{sub s }π{sup 0} reaction at 353–700 MeV

• Published in: Physics of particles and nuclei 2014-01, Vol.45 (1)
• Main Author: Tsirkov, D.
• Format: Article
• Language: English
• Subjects: DIFFERENTIAL CROSS SECTIONS; ENERGY DEPENDENCE; PERTURBATION THEORY; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; POLARIZED BEAMS; S WAVES
• ISSN: 1063-7796; 1531-8559
• DOI: 10.1134/S1063779614011085

The reaction p {sub pol} p → {pp}{sub s }π{sup 0} was studied with the ANKE spectrometer at COSY-Jülich using a polarized beam with energies 353, 500, 550 and 700 MeV. The proton pairs {pp}{sub s }were detected at low excitation energy E {sub pp }< 3 MeV, where S-wave dominates. The angular dependences of vector analysing power A {sub y }and differential cross section dσ/dΩ of the reaction have been obtained for the most of the angular range at 353 MeV and forward angles at the higher beam energies. The partial wave amplitude analysis, done with the 353 MeV results, is important for Chiral Perturbation Theory tests at this energy. The data at higher energies detalize the energy dependence of dσ/dΩ(0°) obtained earlier. It allows to learn about the dynamics of the Δ(1232) resonance excitation in two-nucleon systems.