Sprecher
Dr.
Wojciech Krzemien
(M. Smoluchowski Institute of Physics, Jagiellonian University, 30-059 Cracow, Poland)
Beschreibung
The eta-mesic nuclei in which the eta meson is bound with nucleus via strong interaction was postulated about 25 years ago, however till now there is no direct experimental confirmation of its existence.
We search for an evidence of eta-mesic He with the WASA detector. An exclusive measurement of the excitation functions for the dd->3Heppi- and for the dd->3Henpi0->3Hengg reactions was performed at the Cooler Synchrotron COSY-Juelich with the WASA-at-COSY detection system. The outgoing N-pi pairs originate from the conversion of the eta meson on a nucleon inside the He nucleus. The data were collected in two dedicated experiments in 2008 and in 2010.
The experimental method and the current status of the research will be presented.
Autor
Dr.
Wojciech Krzemien
(M. Smoluchowski Institute of Physics, Jagiellonian University, 30-059 Cracow, Poland)
Co-Autoren
Frau
Magdalena Skurzok
(M. Smoluchowski Institute of Physics, Jagiellonian University, 30-059 Cracow, Poland)
Prof.
Pawel Moskal
(M. Smoluchowski Institute of Physics, Jagiellonian University, 30-059 Cracow, Poland,IKP, Forschungszentrum Juelich, D-52425 Juelich, Germany)
