1. Measurements of the strong-interaction widths of the kaonic 3He and 4He 2p levels
- Author
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The SIDDHARTA Collaboration, Bazzi, M., Beer, G., Bombelli, L., Bragadireanu, A. M., Cargnelli, M., Curceanu, C., d'Uffizi, A., Fiorini, C., Frizzi, T., Ghio, F., Guaraldo, C., Hayano, R. S., Iliescu, M., Ishiwatari, T., Iwasaki, M., Kienle, P., Sandri, P. Levi, Longoni, A., Marton, J., Okada, S., Pietreanu, D., Ponta, T., Rizzo, A., Vidal, A. Romero, Sbardella, E., Scordo, A., Shi, H., Sirghi, D. L., Sirghi, F., Tatsuno, H., Tudorache, A., Tudorache, V., Doce, O. Vazquez, Wunschek, B., Widmann, E., and Zmeskal, J.
- Subjects
Physics ,Nuclear and High Energy Physics ,X-ray spectroscopy ,sezele ,010308 nuclear & particles physics ,Strong interaction ,Low-energy QCD ,FOS: Physical sciences ,Kaonic atoms ,Antikaon–nucleon physics ,01 natural sciences ,Article ,Nuclear physics ,0103 physical sciences ,Nuclear Experiment (nucl-ex) ,Atomic physics ,010306 general physics ,Nuclear Experiment ,Value (mathematics) - Abstract
The kaonic 3He and 4He X-rays emitted in the 3d-2p transitions were measured in the SIDDHARTA experiment. The widths of the kaonic 3He and 4He 2p states were determined to be Gamma_2p(3He) = 6 \pm 6 (stat.) \pm 7 (syst.) eV, and Gamma_2p(4He) = 14 \pm 8 (stat.) \pm 5 (syst.) eV, respectively. Both results are consistent with the theoretical predictions. The width of kaonic 4He is much smaller than the value of 55 \pm 34 eV determined by the experiments performed in the 70's and 80's, while the width of kaonic 3He was determined for the first time., Comment: Accepted in Phys. Lett. B
- Published
- 2012