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Journal Articles

Observation of a $$Xi$$ bound state in the $$^{12}$$C$$(K^-, K^+)$$ reaction at 1.8 GeV/$$c$$

Nagae, Tomofumi*; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi; Kimbara, Shinji; Nanamura, Takuya*; Naruki, Megumi; et al.

AIP Conference Proceedings 2130, p.020015_1 - 020015_9, 2019/07

Journal Articles

Observation of a Be double-Lambda hypernucleus in the J-PARC E07 experiment

Ekawa, Hiroyuki; Ashikaga, Sakiko; Hasegawa, Shoichi; Hashimoto, Tadashi; Hayakawa, Shuhei; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi; Kimbara, Shinji*; Nanamura, Takuya; et al.

Progress of Theoretical and Experimental Physics (Internet), 2019(2), p.021D02_1 - 021D02_11, 2019/02

 Times Cited Count:13 Percentile:85.21(Physics, Multidisciplinary)

Journal Articles

Study of the $$overline{K}$$-nucleus interaction by using the $$^{12}$$C(K$$^{-}$$, p) reaction at J-PARC

Ichikawa, Yudai; Ekawa, Hiroyuki; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Imai, Kenichi; Kimbara, Shinji; Nakada, Yoshiyuki; Sako, Hiroyuki; Sato, Susumu; et al.

JPS Conference Proceedings (Internet), 13, p.020007_1 - 020007_5, 2017/02

An interaction between K$$^{bar}$$ and nucleus is studied by using the X-ray from the kaonic atoms for a long time. However, it is difficult to determine the K$$^{bar}$$-nucleus interaction by using only kaonic-atoms data because the value of shift and width of the X-ray depend not only the potential depth but also the type of theoretical model. Thus, we study the $$overline{K}$$-nucleus interaction by comparing an observed missing-mass spectrum of the $$^{12}$$C(K$$^{-}$$, p) reaction with the DWIA calculation. Such a study has already reported from KEK-E548 experiment. However, their experiment is not enough to determine these interaction because they were pointed out about the experimental condition. Thus, we performed the further experiment to take the real spectrum of $$^{12}$$C(K$$^{-}$$, p) reaction at J-PARC.

Journal Articles

Observation of spin-dependent charge symmetry breaking in $$Lambda N$$ interaction; $$gamma$$-ray spectroscopy of $$^4_{Lambda}$$He

Yamamoto, T. O.*; Hasegawa, Shoichi; Hayakawa, Shuhei; Hosomi, Kenji; Hwang, S.; Ichikawa, Yudai; Imai, Kenichi; Kimbara, Shinji; Nakada, Yoshiyuki; Sako, Hiroyuki; et al.

Physical Review Letters, 115(22), p.222501_1 - 222501_5, 2015/11

AA2015-0707.pdf:0.5MB

 Times Cited Count:54 Percentile:92.84(Physics, Multidisciplinary)

Oral presentation

Development of PID method in nuclear emulsion

Kimbara, Shinji; Tanida, Kiyoshi

no journal, , 

Our goal is to develop image processing method to identify daughter nucleus decayed from double-hypernuclei. To develop the method, emulsion stack was exposed to one particle with several incident angles from the normal line to the surface of the stack. We will present the result of the PID method applied for particle Z = 1$$sim$$5 in nuclear emulsion at RIKEN experiment.

Oral presentation

Establishment of PID method by ionization loss in nuclear emulsion

Kimbara, Shinji; Hwang, S.

no journal, , 

Our aim is to develop the technique which identify daughter nucleus decayed from double-hypernucleus. To develop the technique, 8 particles were exposed to emulsion stack with several angles at RIKEN. We will present the result applied for particle exposed horizontally to emulsion stack.

Oral presentation

Development of the technique to identify daughter charged particle of hypernucleus

Kimbara, Shinji

no journal, , 

To understand the YY interaction, it is necessary to identify nucleus of daughter particle. For the development of this method, the key point is that track thickness of charged particles in the emulsion reflects their energy-losses. We summed up their energy-losses up to 100 um for each particle, and obtained ratios for H. Their ratio for He, Li Be and B becomes large by 4, 8, 12, 17 times rather than that of H, respectively. In this presentation, we will report status analysis and future plan.

Oral presentation

Status of the J-PARC E07 emulsion analysis

Yoshida, Junya; Ohashi, Masaki*; Goto, Ryosuke*; Nagase, Yuichi*; Murai, Rina*; May, S.*; Aye, M. M. T.*; Kimbara, Shinji*; Yoshimoto, Masahiro*; Nakazawa, Kazuma*

no journal, , 

J-PARC E07 collaboration has been performed K- beam exposure to all the emulsion sheet detector. The analysis for double strangeness nuclei is ongoing. We'll discuss the current status, performance, speed, and future prospects.

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