Search for the K− pp bound state via the 3He(K−, n) reaction at 1 GeV/c

• Published in: Journal of physics. Conference series 2014-12, Vol.569 (1)
• Main Authors: Hashimoto, T, Ajimura, S, Beer, G, Bhang, H, Bragadireanu, M, Buehler, P, Busso, L, Cargnelli, M, Choi, S, Curceanu, C, Enomoto, S, Faso, D, Fujioka, H, Fujiwara, Y, Fukuda, T, Guaraldo, C, Hayano, R S, Hiraiwa, T, Iio, M, Iliescu, M, Inoue, K, Ishiguro, Y, Ishikawa, T, Ishimoto, S, Ishiwatari, T, Itahashi, K, Iwai, M, Iwasaki, M, Kato, Y, Kawasaki, S, Kienle, P, Kou, H, Y Ma, Marton, J, Matsuda, Y, Mizoi, Y, Morra, O, Nagae, T, Noumi, H, Ohnishi, H, Okada, S, Outa, H, Piscicchia, K, M Poli Lener, A Romero Vidal, Sada, Y, Sakaguchi, A, Sakuma, F, Sato, M, Scordo, A, Sekimoto, M, Shi, H, Sirghi, D, Sirghi, F, Suzuki, K, Suzuki, S, Suzuki, T, Tanida, K, Tatsuno, H, Tokuda, M, Tomono, D, Toyoda, A, Tsukada, K, O Vazquez Doce, Widmann, E, Wuenschek, B K, Yamaga, T, Yamazaki, T, Yim, H, Zhang, Q, Zmeskal, J
• Format: Article
• Language: English
• Subjects: Charge exchange; Kaons; Physics; Proton accelerators
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/569/1/012080

The J-PARC E15 experiment searches for the simplest kaonic nuclear bound state, K−pp, via the 3He(K−,n) reaction at the K1.8BR beam-line in the J-PARC hadron experimental facility. We performed the first data-taking in May, 2013, with 5 × 109 incident kaons on the 3He target. The preliminary results are reported focusing on the forward-neutron spectrum, which shows a clear peak structure composed of the quasi-elastic K−"n" → K−n and the charge-exchange K−"p" → 0n reactions as expected.