Tübingen 2003 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 28: Elektromagnetische und hadronische Proben IV

HK 28.1: Gruppenbericht

Mittwoch, 19. März 2003, 10:45–11:15, F

The Deuteron Breakup Experiment at ANKE — •S. Yaschenko^3,1, S. Dymov¹, R. Engels², A. Kacharava^3,4, H. Kleines⁵, V. Komarov¹, V. Koptev⁶, P. Kravtsov⁶, A. Kulikov¹, V. Kurbatov¹, B. Lorentz², G. Macharashvili^1,4, M. Mikirtytchiants⁶, V. Nelyubin⁶, H. Paetz gen. Schieck⁷, A. Petrus¹, D. Prasuhn², F. Rathmann², J. Sarkadi⁵, H. Seyfarth², E. Steffens³, H. Ströher², Yu. Uzikov^1,8, A. Vassiliev⁶, B. Zalikhanov¹, and K. Zwoll⁵ — ¹LNP, JINR, Dubna, Russia — ²IKP, FZJ, Germany — ³PI II, Universität Erlangen–Nürnberg, Germany — ⁴HEPI, TSU, Georgia — ⁵ZEL, FZJ, Germany — ⁶HEPD, PNPI, Gatchina, Russia — ⁷IKP, Universität zu Köln, Germany — ⁸KNU, Almaty, Kazakhstan

A measurement of the reaction pd → (pp)n with forward emission of a fast proton pair with excitation energy E_pp< 3 MeV was carried out at six proton-beam energies T_p=0.6 − 1.9 GeV at ANKE (COSY–Jülich). The differential cross section of the reaction, averaged up to 8^∘ over the cm polar angle of the total momentum of the pp pairs, was obtained. The results are compared to calculations based on a theoretical model, previously applied to the pd → dp process. A first preliminary value of the vector analyzing power A_y^p was also obtained with polarized beam.

For future few–nucleon interaction studies with polarized beams and targets at COSY–Jülich, a polarized internal storage cell gas target is currently being developed and will be implemented at ANKE. The polarized atomic beam source is already performing well. In addition, a Lamb-Shift target polarimeter is currently set up.