Resolved the kaonic helium-4 puzzle (KEK-PS E570 experiment)

Monday 16 Feb 2009, 15:00 → 16:00 Europe/Rome

Aula Leale - Edificio 22 (Laboratori Nazionali di Frascati)

We measured the kaonic helium-4 atoms 3d->2p x-rays energy and determined the strong interaction shift to be 2+-2(stat.)+-2(syst.) eV. Our precise result resolved the long-standing kaonic helium puzzle between theory and experiment. We used silicon drift detectors (SDDs) as x-ray detectors which produced by KETEK. This was the first time application of SDDs in the exotic atom field. The details of the experiment will be reported in this seminar.