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.
@article{arxiv.hep-ex/0409048,
title = {New results on the pd --> 3He eta production near threshold},
author = {H. -H. Adam and A. Khoukaz and N. Lang and T. Lister and R. Santo and S. Steltenkamp and R. Czyzykiewicz and M. Janusz and L. Jarczyk and B. Kamys and P. Moskal and C. Piskor-Ignatowicz and J. Przerwa and J. Smyrski and D. Grzonka and K. Kilian and W. Oelert and T. Sefzick and P. Winter and M. Wolke and P. Wuestner and A. Budzanowski and T. Rozek and M. Siemaszko and W. Zipper},
journal= {arXiv preprint arXiv:hep-ex/0409048},
year = {2009}
}
Comments
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