New results on the pd --> 3He eta production near threshold

Adam, H. -H.; Khoukaz, A.; Lang, N.; Lister, T.; Santo, R.; Steltenkamp, S.; Czyzykiewicz, R.; Janusz, M.; Jarczyk, L.; Kamys, B.; Moskal, P.; Piskor-Ignatowicz, C.; Przerwa, J.; Smyrski, J.; Grzonka, D.; Kilian, K.; Oelert, W.; Sefzick, T.; Winter, P.; Wolke, M.; Wuestner, P.; Budzanowski, A.; Rozek, T.; Siemaszko, M.; Zipper, W.

New results on the pd --> 3He eta production near threshold

Authors

Description

Measurements on the eta meson production in proton-deuteron collisions have been performed using the COSY-11 facility at COSY Juelich. Here we present preliminary results on total and differential cross sections for the pd --> 3He eta reaction at five excess energies between Q = 5.1 and Q = 40.6 MeV. The obtained angular distributions for the emitted eta mesons in the center of mass system expose a transition from an almost isotropic emission to a highly anisotropic distribution. The extracted total cross sections support a strong eta-3He final state interaction and will be compared with model predictions.
Presented at MESON 2004: 8th International Workshop on Meson Production, Properties and Interactions, Cracow, Poland, 4-8 Jun 2004, 3 pages, Submitted to Int. J. Mod. Phys. A