Kaonic 3He and 4He measurements in the SIDDHARTA experiment at the DAΦNE collider
1 INFN, Laboratori Nazionali di Frascati, Frascati (Roma), Italy
2 Department of Physics and Astronomy, University of Victoria, Victoria, BC, Canada
3 Politecnico di Milano, Sezione di Elettronica, Milano, Italy
4 Horia Hulubei National Institute of Physics and Nuclear Engineering, Magurele, Romania
5 Stefan-Meyer-Institut für subatomare Physik, Vienna, Austria
6 INFN Sezione di Roma I and Istituto Superiore di Sanità, Roma, Italy
7 The University of Tokyo, Tokyo, Japan
8 RIKEN, The Institute of Physics and Chemical Research, Saitama, Japan
9 Technische Universität München, Physik Department, Garching, Germany
10 University of Santiago de Compostela, Santiago de Compostela, Spain
a e-mail: email@example.com
The SIDDHARTA collaboration measured kaonic 3He and 4He 3d → 2p X-rays with gaseous targets at the DAΦNE e+e− collider. The 2p-state strong-interaction shifts and widths were precisely determined by using 144 high-resolution silicon drift detectors. The shift of K−4He is in good agreement with theoretical calculations and consistent with the recent experimental result of KEK-PS E570. The shift of K−3He is also determined for the first time. The newly determined widths are in agreement with optical model calculations.
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