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Measurements of the strong-interaction widths of the kaonic (3)He and (4)He 2p levels |
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| Authors: | SIDDHARTA Collaboration 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 Ishiwatari T 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 Wünschek B Widmann E Zmeskal J |
| Abstract: | The kaonic (3)He and (4)He X-rays emitted in the Formula: see text] transitions were measured in the SIDDHARTA experiment. The widths of the kaonic (3)He and (4)He 2p states were determined to be Formula: see text], and Formula: see text], respectively. Both results are consistent with the theoretical predictions. The width of kaonic (4)He is much smaller than the value of Formula: see text] determined by the experiments performed in the 70's and 80's, while the width of kaonic (3)He was determined for the first time. |
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