An experimental search for the K-pp bound state, which is considered the simplest kaonic nucleus, is performed by using the d(φ +Kφ +) reaction at J-PARC K1.8 beam line (J-PARC E27 experiment). The first data taking as a pilot run was carried out in June, 2012. The missing-mass spectrum of this reaction studied at the beam momentum of 1.7 GeV/c, which allows the production of (1405), was obtained for the first time and a significant peak shift by ∼40 MeV was observed in the Y∗ region. In a preliminary proton-coincidence analysis, a sharp spike due to the ∼N-\λN coupling and a broad enhancement around 2.3 GeV/c2, which might be attributed to the K-pp bound state, was clearly observed.
|ジャーナル||Proceedings of Science|
|出版ステータス||Published - 2013|
|イベント||15th International Conference on Hadron Spectroscopy, Hadron 2013 - Nara, Japan|
継続期間: 2013 11 4 → 2013 11 8
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