A SEARCH FOR DEEPLY-BOUND KAONIC NUCLEAR STATES BY IN-FLIGHT He-3(K-, n) REACTION AT J-PARC

作者：Sakuma F^*; Ajimura S; Beer G; Bhang H; Bragadireanu M; Buehler P; Busso L; Cargnelli M; Choi S; Curceanu C; Enomotoi S; Faso D; Fujioka H; Fujiwara Y; Fukuda T; Guaraldo C; Hashimoto T; 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; Ma Y; Marton J; Matsuda Y; Mizoi Y; Morra O; Nagae T; Noumi H

来源：Acta Physica Polonica B, 2014, 45(3): 767-773.

DOI：10.5506/APhysPolB.45.767

We report on preliminary results of the J-PARC E15 experiment aiming to search for the simplest kaonic-nuclear bound-state, K-pp, via in-flight He-3(K-, n) reaction. The first physics data-taking was performed with 5 X 10(9) incident kaons on the He-3 target, and 3 x 10(5) neutrons were collected by a forward neutron counter placed 15 m away from center of the target at 0 degrees. The semi-inclusive neutron spectrum shows clear peak structure composed of the quasi-elastic K(-)n -> K(-)n and the charge exchange K(-)p -> (K) over bar (0)n reactions as expected.

• 出版日期2014-3
• 单位RIKEN