A search for the K−pp bound state in the 3He(K−in-flight, n) reaction at J-PARC

Takuya Hashimoto,S Ajimura,G Beer,H Bhang,M Bragadireanu, P Buehler,L Busso,M Cargnelli,Sunghyun Choi,C Curceanu,S Enomoto,D Faso,Hisaya Fujioka, Yasumasa Fujiwara,Tsuyoshi Fukuda,C Guaraldo,R S Hayano,T Hiraiwa,M Iio,M Iliescu,Katsuro Inoue, Y Ishiguro,T Ishikawa,S Ishimoto,T Ishiwatari,K Itahashi,Masayuki Iwai,M Iwasaki, Y Kato, S Kawasaki,P Kienle,H Kou,Yong 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 Vida,Y Sada,A Sakaguchi,F Sakuma,Masaru Sato,A Scordo,Mitsugu Sekimoto,Han Shi,D L Sirghi,F Sirghi,Kenichiro Suzuki,S Suzuki,Takahiro Suzuki,K Tanida,H Tatsuno,Masamitsu Tokuda,D Tomono,Atsushi Toyoda,K Tsukada,O Vazquez Doce,E Widmann, B K Wuenschek,T Yamaga,Takahiro Yamazaki,H Yim,Qi Zhang, J Zmeska

EPJ Web of Conferences（2014）

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摘要

We have collected the first physics data of an experimental search for the simplest kaonic nuclear bound state, "K- pp", by the He-3(K-, n) reaction at J-PARC. We confirmed that our spectrometer system works as designed and observed clear peak structure composed of the quasi-elastic K-"n" -> K(-)n and the charge-exchange K-"p" -> k(0)n Int reactions in the forward neutron spectrum.

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