Discovery of a strange tribaryon S0(3115) in 4He(stopped K−,p) reaction
- Suzuki, T.
- Bhang, H.
- Franklin, G.
- Gomikawa, K.
- Hayano, R.S.
- Hayashi, T.
- Ishikawa, K.
- Ishimoto, S.
- Itahashi, K.
- Iwasaki, M.
- Katayama, T.
- Kondo, Y.
- Matsuda, Y.
- Nakamura, T.
- Okada, S.
- Outa, H.
- Quinn, B.
- Sato, M.
- Shindo, M.
- So, H.
- Strasser, P.
- Sugimoto, T.
- Suzuki, K.
- Suzuki, S.
- Tomono, D.
- Vinodkumar, A.M.
- Widmann, E.
- Yamazaki, T.
- Yoneyama, T.
DOIAbstract
AbstractWe have measured the proton energy distribution from the 4He(stopped K−,p) reaction by means of time-of-flight. A mono-energetic peak was observed, which is interpreted as the formation of a new kind of neutral tribaryon S0(3115) with isospin T=1 and strangeness S=−1. The mass and width of the state were deduced to be 3117.0−4.4+1.5MeV/c2 and <21MeV/c2, respectively. The state mainly decays into ΣNN
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