Author/Authors :
T. Suzuki، نويسنده , , H. Bhang، نويسنده , , Rodney C. G. Franklin، نويسنده , , K. Gomikawa، نويسنده , , R.S. Hayano، نويسنده , , T. Hayashi، نويسنده , , K. Ishikawa، نويسنده , , S. Ishimoto، نويسنده , , K. Itahashi، نويسنده , , M. Iwasaki، نويسنده , , T. Katayama، نويسنده , , Y. Kondo، نويسنده , , Y. Matsuda، نويسنده , , T. Nakamura، نويسنده , , S. Okada، نويسنده , , H. Outa، نويسنده , , B. Quinn، نويسنده , , M. Sato، نويسنده , , M. Shindo، نويسنده , , H. So، نويسنده , , et al.، نويسنده ,
Abstract :
We have measured proton and neutron energy spectra by means of time-of-flight (TOF) from 4He(View the MathML source) reactions (KEK PS E471 experiment). In the proton spectrum, a clear mono-energetic peak was observed under semi-inclusive condition, which was assigned to the formation of a strange tribaryon S0(3115) with isospin T=1. The mass and width of the state were deduced to be View the MathML source and <21.6 MeV/c2, respectively, and its main decay mode was ΣNN. In the neutron spectrum, a mono-energetic peak was found as the result of a detailed analysis, which was assigned to the formation of another kind of strange tribaryon S+(3140). The mass and width of the state were deduced to be View the MathML source and <21.6 MeV/c2, respectively, and its main decay mode was Σ±NN. The isospin of the state is assigned to be 0. The results are compared with recent theoretical calculations.
