Gamma-ray spectroscopy of single Λ-hypernuclei at J-PARC: Results and perspective

Takeshi Koike, M. Agnello, J. K. Ahn, Y. Akazawa, N. Amano, K. Aoki, E. Botta, N. Chiga, H. Ekawa, P. Evtoukhovitch, A. Feliciello, M. Fujita, T. Gogami, S. Hasegawa, S. H. Hayakawa, T. Hayakawa, R. Honda, K. Hosomi, S. H. Hwang, N. IchigeY. Ichikawa, M. Ikeda, K. Imai, S. Ishimoto, S. Kanatsuki, M. H. Kim, S. H. Kim, S. Kinbara, K. Kobayashi, J. Y. Lee, S. Marcello, K. Miwa, T. J. Moon, T. Nagae, S. Nagao, Y. Nakada, M. Nakagawa, Y. Ogura, A. Sakaguchi, H. Sako, Y. Sasaki, S. Sato, T. Shiozaki, K. Shirotori, H. Sugimura, S. Suto, S. Suzuki, T. Takahashi, H. Tamura, K. Tanabe, K. Tanida, Y. Togawa, Z. Tsamalaidze, M. Ukai, T. F. Wang, T. O. Yamamoto, S. B. Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


Experimental results from the J-PARC E13 experiments are summarized. A new experimental set up of E13 has established a platform for the future γ-ray hypernuclear spectroscopy at J-PARC using kaon beams. New γ rays are identified in HeΛ4 and FΛ19. The energy of 1.406 MeV for the HeΛ4(1+→0+) transition confirmed a sizable effect of Charge Symmetry Breaking (CSB) in ΛN interaction in the A=4 hypernuclear system. The identification of four γ rays in FΛ19 is made for the first time in sd shell hypernuclei. Especially, energy spacing of the ground state doublet is found to be 315.5 keV. A good agreement with two theoretical calculations suggests that the theoretical formalism used in p shell hypernuclei is also applicable to heavier hypernuclei. Lastly, an overview of the future J-PARC E63 experiment is given.

Original languageEnglish
Title of host publication13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018
EditorsReinhard Schumacher, Liguang Tang
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735418721
Publication statusPublished - 2019 Jul 25
Event13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018 - Portsmouth, United States
Duration: 2018 Jun 242018 Jun 29

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018
Country/TerritoryUnited States

Bibliographical note

Funding Information:
calculations of Λ19F. This work is partially supported by the Tohoku Universitys Focused Research Project, and Grants-in-Aid No. 17070001, No. 21684011, No. 23244043, No. 24105003, No. 24740138, and No. 15H02079 for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) Japan. This research is supported also by World Class University program (Grant No. R32-10155), Basic Research (Young Researcher) (Grant No. 2010-0004752), Center for Korean J-PARC Users (Grants No. K2100200173811B130002410 and No. NRF-2013K1A3A7A06056592), and Brain Korea 21 Plus program through National Research Foundation (NRF) of Korea.

Publisher Copyright:
© 2019 Author(s).

ASJC Scopus subject areas

  • General Physics and Astronomy


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