07.01.2010 17:15

Search for η-mesic helium using WASA-at-COSY

P. Moskal

The installation of the WASA detector at the cooler synchrotron COSY opened the possibility to search for η-mesic helium with high statistics and high acceptance. A search for the 4He-η bound state is conducted via an exclusive measurement of the excitation function for the dd → 3He pπ- reaction varying continuously the beam momentum around the threshold for the dd → 4He η reaction. Ramping of the beam momentum and taking advantage of the large acceptance of the WASA detector allows to minimize systematical uncertainities. In the presentation the status and perspectives of the search of the η-mesic helium at the cooler synchrotron COSY will be reviewed.

Category: Kolloquium