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Study of $$Lambda N$$ interaction via the $$gamma$$-ray spectroscopy of $$^4_{Lambda}$$He and $$^{19}_{Lambda}$$F (E13-1st)

$$^4_{Lambda}$$Heおよび$$^{19}_{Lambda}$$Fの$$gamma$$線分光による$$Lambda N$$相互作用の研究(E13-1st)

山本 剛史*; 江川 弘行; 長谷川 勝一; 早川 修平; 細見 健二; 市川 裕大; 今井 憲一; 佐甲 博之; 佐藤 進; 杉村 仁志; 谷田 聖; 他39名*

Yamamoto, T. O.*; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; Sugimura, Hitoshi; Tanida, Kiyoshi; 39 of others*

A $$gamma$$-ray spectroscopy experiment via the $$(K^-, pi^-)$$ reaction (J-PARC E13-1st) will be performed at the J-PARC Hadron Experimental Facility using a newly developed Ge detector array, Hyperball-J. Spin-dependent $$Lambda N$$ interactions will be studied through the precise measurement of the structure of hypernuclei, $$^4_{Lambda}$$He and $$^{19}_{Lambda}$$F. In May 2013, commissioning of whole detector system was carried out and calibration data were taken. In particular, production cross sections of $$Sigma^+$$ and $$^{12}_{Lambda}$$C via the $$(K^-, pi^-)$$ reaction on the CH$$_2$$ target for $$p_K = 1.5$$ and 1.8 GeV/$$c$$ were obtained.

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