Berlin 2005 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
HK: Physik der Hadronen und Kerne
HK 31: Elektromagnetische und Hadronische Proben
HK 31.5: Vortrag
Dienstag, 8. März 2005, 17:30–17:45, TU MA004
Study of the deuteron breakup pd → (pp)n at high momentum transfer at ANKE/COSY* — •Sergey Yaschenko — Universität Erlangen–Nürnberg, Germany
The deuteron–breakup reaction pd → ppn at GeV projectile energies with emission of a fast forward diproton provides a new tool to investigate the pd dynamics at high–momentum transfer. The ANKE spectrometer at COSY–Jülich is well suited to obtain new data, e.g. the cross section and polarization observables in the p→ d→ → (pp)n reaction, which should allow one to gain more insight into systems composed of more than two nucleons.
Recently, measurements of the unpolarized differential cross section at energies Tp= 0.6, 0.7, 0.8, 0.95, 1.35, and 1.9 GeV and the vector analyzing power Ay at Tp= 0.5 and 0.8 GeV in the deuteron breakup were carried out. The results were compared with calculations based on a theoretical model taking into account one–nucleon exchange, single scattering, and Δ excitation in the intermediate state. Employing the high precision CD–Bonn potential this model describes fairly well the energy dependence of the unpolarized cross section and the analyzing power at 0.8 GeV, it fails to reproduce Ay at 0.5 GeV.
At present, data with high statistics at Tp= 0.5, 0.8, 1.1, 1.4, and 2.0 GeV are being analyzed. The current status of the data analysis, preliminary results on differential cross sections in comparison with theoretical predictions and the plans for future measurements are presented.
* supported by FZ–Jülich, BMBF, WTZ.