Measurement of p + d -> 3He + eta in S(11) Resonance

M. Betigeri, J. Bojowald, A. Budzanowski, A. Chatterjee, M. Drochner, J. Ernst, S. Foertsch, L. Freindl, D. Frekers, W. Garske, K. Grewer, A. Hamacher, S. Igel, J. Ilieva, R. Jahn, L. Jarczyk, G. Kemmerling, K. Kilian, S. Kliczewski, W. Klimala, D. Kolev, T. Kutsarova, J. Lieb, G. Lippert, H. Machner, A. Magiera, H. Nann, L. Pentchev, H. S. Plendl, D. Protic, B. Razen, P. von Rossen, B. R. Roy, R. Siudak, J. Smyrski, A. Strzalkowski, R. Tsenov, P. A. Zolnierczuk, K. Zwoll

Published 1999-12-08, updated 1999-12-09Version 2

We have measured the reaction p + d -> 3He + eta at a proton beam energy of 980 MeV, which is 88.5 MeV above threshold using the new ``germanium wall'' detector system. A missing--mass resolution of the detector system of 2.6% was achieved. The angular distribution of the meson is forward peaked. We found a total cross section of (573 +- 83(stat.) +- 69(syst.))nb. The excitation function for the present reaction is described by a Breit Wigner form with parameters from photoproduction.