Strong-interaction shifts and widths of kaonic helium isotopes

The kaonic 3He and 4He 3d→2p 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 K+K− pairs produced by the DAΦNE e+e− collider. The strong-interact...

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Published inNuclear physics. A Vol. 914; no. 100; pp. 305 - 309
Main Authors Ishiwatari, T., Bazzi, M., Beer, G., Bombelli, L., Bragadireanu, A.M., Cargnelli, M., Curceanu (Petrascu), C., dʼUffizi, A., Fiorini, C., Frizzi, T., Ghio, F., Guaraldo, C., Hayano, R.S., Iliescu, M., Iwasaki, M., Kienle, P., Levi Sandri, P., Longoni, A., Marton, J., Okada, S., Pietreanu, D., Ponta, T., Rizzo, A., Romero Vidal, A., Sbardella, E., Scordo, A., Shi, H., Sirghi, D.L., Sirghi, F., Tatsuno, H., Tudorache, A., Tudorache, V., Vazquez Doce, O., Widmann, E., Wünschek, B., Zmeskal, J.
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 20.09.2013
North Holland Pub. Co
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Summary:The kaonic 3He and 4He 3d→2p 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 K+K− pairs produced by the DAΦNE e+e− 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.
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ISSN:0375-9474
DOI:10.1016/j.nuclphysa.2012.12.020