[HTML][HTML] Discovery of a strange tribaryon S0 (3115) in 4He (stopped K−, p) reaction

T Suzuki, H Bhang, G Franklin, K Gomikawa… - Physics Letters B, 2004 - Elsevier
T Suzuki, H Bhang, G Franklin, K Gomikawa, RS Hayano, T Hayashi, K Ishikawa, S Ishimoto…
Physics Letters B, 2004Elsevier
We 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+ 1.5 MeV/c2 and<
21MeV/c2, respectively. The state mainly decays into ΣNN.
We 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.
Elsevier
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