Study of the Lambda hypernuclei close to the neutron drip-line by the double charge-exchange reaction

• Project/Area Number: 24540305
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Osaka University
• Principal Investigator: SAKAGUCHI Atsushi 大阪大学, 理学(系)研究科(研究院), 准教授 (70205730)
• Co-Investigator(Renkei-kenkyūsha): FUKUDA Tomokazu 大阪電気通信大学, 工学部, 教授 (50116092) ; AJIMURA Shuhei 大阪大学, 核物理研究センター, 准教授 (10273575) ; MIZOI Yutaka 大阪電気通信大学, 工学部, 講師 (30388392)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 中性子過剰ラムダ・ハイパー核 / 二重荷電交換反応 / 中性子ドリップライン / 大強度中間子ビーム / ２重荷電交換反応 / 中性子過剰ラムダハイパー核

Outline of Final Research Achievements

The subject of this research is a study of new nuclei 'Lambda hypernuclei' for which a Lambda hyperon, one of baryon with the strangeness degree of freedom, is embedded in nuclei. The double charge-exchange reaction is employed to create and study neutron-rich Lambda hypernuclei. One of difficulties in the measurement of the double charge-exchange reaction is the tiny reaction cross section. To override the difficulty, high-intensity hadron beams are used, and detectors are developed for the high beam rate environment. An experiment to search for the neutron-rich Lambda hypernucleus 6(Lambda)H close to the neutron drip-line was performed at the J-PARC 50GeV Proton Synchrotoron Accelerator facility.

Research Products

• [Journal Article] Observation of the ”K－pp”-like structure in the d(π+,K+) reaction at 1.69 GeV/c (2015)
  • Author(s): Y. Ichikawa et al.
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 2015-2 Issue: 2 Pages: 21D01-0
  • DOI: 10.1093/ptep/ptv002
  • Peer Reviewed / Open Access
• [Journal Article] Inclusive spectrum of the d(π+, K+) reaction at 1.69 GeV/c (2014)
  • Author(s): Y. Ichikawa et al.
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 2014-10 Issue: 10 Pages: 101D03-101D03
  • DOI: 10.1093/ptep/ptu128
  • Peer Reviewed / Open Access
• [Journal Article] Search for the K-pp bound state via the in-flight 3He(K-,n) reaction (2014)
  • Author(s): Y. Sada, H. Outa, A. Sakaguchi et al.
  • Journal Title: Euro. Phys. J. Web Conf. Volume: 81 Pages: 020161-4
  • DOI: 10.1051/epjconf/20148102016
  • Peer Reviewed / Open Access
• [Journal Article] High-resolution search for the Θ+ pentaquark via a pion-induced reaction at J-PARC (2014)
  • Author(s): M. Moritsu et al. (J-PARC E19 Collaboration)
  • Journal Title: Physical Review C Volume: 90 Issue: 3 Pages: 035205-035205
  • DOI: 10.1103/physrevc.90.035205
  • Peer Reviewed
• [Journal Article] Search for the K-pp bound state via the 3He(K-,n) reaction at 1 GeV/c (2014)
  • Author(s): T. Hashimoto, H. Outa, A. Sakaguchi et al.
  • Journal Title: J. Phys. Conf. Ser. Volume: 569 Pages: 0120801-5
  • DOI: 10.1088/1742-6596/569/1/012080
  • Peer Reviewed / Open Access
• [Journal Article] Search for 6LH hypernucleus by the ^6Li (π-, K+) reaction at pπ=1.2 GeV/c (2014)
  • Author(s): H. Sugimura, M. Agnello, J. K. Ahn, S. Ajimura, Y. Akazawa, N. Amano, K. Aoki, H. C. Bhang, N. Chiga, M. Endo, P. Evtoukhovitch, A. Feliciello, H. Fujioka, T. Fukuda, S. Hasegawa, S. Hayakawa, R. Honda, K. Hosomi, S. H. Hwang, Y. Ichikawa, et al.
  • Journal Title: Physics Letter B Volume: 729 Pages: 39-44
  • DOI: 10.1016/j.physletb.2013.12.062
  • Peer Reviewed
• [Journal Article] Search for K-pp Bound State via γd → K+π-X Reaction at Eγ = 1.5 - 2.4 GeV (2014)
  • Author(s): A.O. Tokiyasu, T. Hotta, T. Nakano, T. Yorita, M. Yosoi, 他全72名
  • Journal Title: Phys. Lett Volume: B728 Pages: 616-621
  • DOI: 10.1016/j.physletb.2013.12.039
  • Peer Reviewed / Open Access
• [Journal Article] Search for Pentaquark Θ^+ in Hadronic Reaction at J-PARC (2013)
  • Author(s): M. Naruki
  • Journal Title: Few-Body Systems Volume: 54 Issue: 7-10 Pages: 955-960
  • DOI: 10.1007/s00601-013-0685-2
  • Peer Reviewed
• [Journal Article] Study of Neutron-Rich Hypernuclei by the (π-,K+) Reaction at J-PARC (2013)
  • Author(s): H. Sugimura, K. Miwa, T. Takahashi, H. Tamura et al.
  • Journal Title: Few Body Systems Volume: 54 Issue: 7-10 Pages: 1235-1238
  • DOI: 10.1007/s00601-013-0655-8
  • Peer Reviewed
• [Journal Article] Search for a bound kaon and pion state (2013)
  • Author(s): K. Kishimoto, S. Ajimura, A. Sakaguchi, T. Fukuda et al.
  • Journal Title: Progress of Theoretical ans Experimental Physics Volume: 2013 Issue: 4 Pages: 41C01-0
  • DOI: 10.1093/ptep/ptt003
  • Peer Reviewed
• [Journal Article] Search for the (-)+pentaquark at J-PARC (2013)
  • Author(s): M. Moritsu, et al.
  • Journal Title: Nucl. Phys. A Volume: (印刷中) Pages: 91-96
  • DOI: 10.1016/j.nuclphysa.2013.01.010
  • Peer Reviewed
• [Journal Article] Hypernuclear spectroscopy of products from 6Li projectiles on a carbon target at 2 AGeV (2013)
  • Author(s): C. Rappold, H. Tamura et al.
  • Journal Title: Nuclear Physics A Volume: 913 Pages: 170-184
  • DOI: 10.1016/j.nuclphysa.2013.05.019
  • Peer Reviewed
• [Journal Article] Search for the (-)+pentaquark via the π- p-> K- X reaction at 1.92 GeV/c (2013)
  • Author(s): K. Shirotori, et al.
  • Journal Title: Phys. Rev. Lett. Volume: 109 Issue: 13 Pages: 132-002
  • DOI: 10.1103/physrevlett.109.132002
  • Peer Reviewed
• [Journal Article] Production of hypernuclei in peripheral HI collisions: The HypHI project at GSI (2012)
  • Author(s): T.R. Saito et al.
  • Journal Title: Nucl. Phys. Volume: A881 Pages: 218-227
  • DOI: 10.1016/j.nuclphysa.2012.02.011
  • Peer Reviewed
• [Journal Article] The K1.8BR spectrometer system at J-PARC (2012)
  • Author(s): K. Agari, et al.
  • Journal Title: Prog. Theor. Exp. Phys. Volume: 02B011 Issue: 1 Pages: 1-28
  • DOI: 10.1093/ptep/pts039
  • Peer Reviewed
• [Journal Article] Beam and SKS spectrometers at the K1.8 beam line (2012)
  • Author(s): T. Takahashi, et al.
  • Journal Title: Prog. Theor. Exp. Phys. Volume: 2012 Issue: 1 Pages: 1-16
  • DOI: 10.1093/ptep/pts023
  • Peer Reviewed
• [Presentation] Neutron-rich Lambda Hypernuclei (2014)
  • Author(s): Atsushi Sakaguchi
  • Organizer: 4th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
  • Place of Presentation: Hawaii (USA)
  • Year and Date: 2014-10-07 – 2014-10-10
  • Invited
• [Presentation] E10 experiment on neutron-rich hypernuclei (2014)
  • Author(s): A. Sakaguchi
  • Organizer: KEK theory center workshop on J-PARC hadron physics
  • Place of Presentation: Ibaraki, Japan
  • Invited
• [Presentation] Study of Lambda hypernuclei close to neutron drip-line (2013)
  • Author(s): A. Sakaguchi
  • Organizer: International Conference on Nuclear Fragmentation 2013, NUFRA2013
  • Place of Presentation: Kemer, Turkey
  • Invited
• [Presentation] Production of Lambda hypernuclei close to neutron drip-line (2012)
  • Author(s): A. Sakaguchi
  • Organizer: International Workshop on Strangeness Nuclear Physics 2012 (SNP12)
  • Place of Presentation: Osaka, Japan
  • Invited
• [Presentation] Study of Lambda hypernuclei close to neutron drip-line (2012)
  • Author(s): A. Sakaguchi
  • Organizer: The 2nd Korea-Japan Workshop on Nuclear and Hadron Physics at J-PARC
  • Place of Presentation: Pusan, Korea
• [Remarks] J-PARC E10 and E22 Experiment
  • URL: http://wwwkm.phys.sci.osaka-u.ac.jp/j-parc-E10-E22/
• [Remarks] J-PARC E10 and E22 Experiment
  • URL: http://wwwkm.phys.sci.osaka-u.ac.jp/j-parc-E10-E22/