Author/Authors :
SIDDHARTA Collaboration، نويسنده , , T. Ishiwatari، نويسنده , , M. Bazzi، نويسنده , , G. Beer، نويسنده , , L. Bombelli، نويسنده , , A.M. Bragadireanu، نويسنده , , M. Cargnelli، نويسنده , , C. Curceanu (Petrascu)، نويسنده , , A. d?Uffizi، نويسنده , , C. Fiorini، نويسنده , , T. Frizzi، نويسنده , , F. Ghio، نويسنده , , C. Guaraldo، نويسنده , , R.S. Hayano، نويسنده , , M. Iliescu، نويسنده , , M. Iwasaki، نويسنده , , P. Kienle، نويسنده , , P. Levi Sandri، نويسنده , , A. L، نويسنده ,
Abstract :
The kaonic 3He and 4He image transitions in gaseous targets were observed by the SIDDHARTA experiment. The X-ray energies of these transitions were measured with large-area silicon-drift detectors using the timing information of the image pairs produced by the DAΦNE image collider. The strong-interaction shifts and widths both of the kaonic 3He and 4He 2p states were determined, which are much smaller than the results obtained by the previous experiments. The “kaonic helium puzzle” (a discrepancy between theory and experiment) was now resolved.
Keywords :
Silicon-drift detectors , Strong interaction , Exotic atoms , Kaonic helium
