Search for the K−pp bound state via the in-flight 3He(K−, n) reaction

Y Sada,S Ajimura,G Beer, H Bhang,M Bragadireanu, P Buehler,L Busso,M Cargnelli,Sunghyun Choi,C Curceanu,S Enomoto,D Faso,Hiromu Fujioka,Yoshinori Fujiwara, T Fukuda,C Guaraldo,Tetsuo Hashimoto,R S Hayano,T Hiraiwa,M Iio,M Iliescu,Kenzo Inoue, Y Ishiguro,Tomohisa Ishikawa,S Ishimoto,T Ishiwatari,K Itahashi,M Iwai,M Iwasaki, Y Kato, Shiro Kawasaki,P Kienle,Hongbing Kou,Y Ma,J Marton,Y Matsuda, Y Mizoi,O Morra,T Nagae,H Noumi,H Ohnishi,S Okada,H Outa,K Piscicchia,M Poli Lener,A Romero Vidal,A Sakaguchi,F Sakuma, Michitomo Sato,A Scordo,Michiko Sekimoto,H Shi,D L Sirghi,F Sirghi,Ken Suzuki,S Suzuki,Takayoshi Suzuki,K Tanida,H Tatsuno,Masahide Tokuda,D Tomono,Atsushi Toyoda,K Tsukada,O Vazquez Doce,E Widmann, B K Weunschek,T Yamaga, T Yamazaki,H Yim, Qiyu Zhang,J Zmeskal

EPJ Web of Conferences（2014）

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摘要

In the J-PARC E15 experiment, a K(-)pp search was performed via the He-3(K-, n) reaction at 1.0 GeV/c. A forward-going neutron is detected by a neutron counter with 15 m flight length, and decay particles from K(-)pp are simultaneously measured by a cylindrical detector system that surrounds a liquid He-3 target system. In March and May, 2013, we carried out the first physics data-taking with 5x10(9) incident kaons on the He-3 target, and we have obtained a preliminary exclusive analysis result of He-3(K-, Lambda p)n reaction.

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