K̄ and nucleus system studied by 12C(K -, p) spectrum

Yudai Ichikawa, Junko Yamagata-Sekihara, Jung Keun Ahn, Yuya Akazawa, Kanae Aoki, Elena Bottta, Hiroyuki Ekawa, Petr Evtoukhovitch, Alessandro Feliciello, Manami Fujita, Toshiyuki Gogami, Shoichi Hasegawa, Tomoyuki Hasegawa, Shuhei Hayakawa, Tomonori Hayakawa, Satoru Hirenzaki, Ryotaro Honda, Kenji Hosomi, Ken'Ichi Imai, Wooseung JungShunsuke Kanatsuki, Shinhyung Kim, Sinji Kinbara, Kazuya Kobayashi, Jaeyong Lee, Simonetta Marcello, Koji Miwa, Taejin Moon, Tomofumi Nagae, Yoshiyuki Nakada, Manami Nakagawa, Takuya Nanamura, Megumi Naruki, Atsushi Sakaguchi, Hiroyuki Sako, Susumu Sato, Yuki Sasaki, Kotaro Shirotori, Hitoshi Sugimura, Toshiyuki Takahashi, Hirokazu Tamura, Kiyoshi Tanida, Zviadi Tsamalaidze, Mifuyu Ukai, Takeshi O. Yamamoto

研究成果: Conference contribution

抄録

We have measured an inclusive missing-mass spectrum of the 12 C(K-, p) reaction over wide energy region at the kaon incident momentum of 1.8 GeV/c at J-PARC K1.8 beam line. This measurement was carried out as a by-product of a pilot run of J-PARC E05 experiment, which searched for the Ξ-hypernuclei via 12C(K-, K+) reaction. We have compared the observed missing-mass spectrum with a DWIA calculation to study the K̄-nucleus interaction. In this comparison, we have changed the depth of both real and imaginary parts of the optical potential between the K̄ and nucleus. It is found that the observed spectrum is best reproduced by the calculation of the potential depth of V0 ∼-80 MeV (real part) and W0 ∼-40 MeV (imaginary part). On the other hand, we have observed a definitive excess around the deeply bound region BK ≳ 100 MeV. The excess cannot be explained by the any optical potential and quasi-free background reaction. It is well fitted with a Breit-Wigner function with a binding energy of 90 MeV and a width of 100 MeV, which can be interpreted as a deeply bound Λ(1405) nucleus.

本文言語English
ホスト出版物のタイトル13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018
編集者Reinhard Schumacher, Liguang Tang
出版社American Institute of Physics Inc.
ISBN(電子版)9780735418721
DOI
出版ステータスPublished - 2019 7 25
イベント13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018 - Portsmouth, United States
継続期間: 2018 6 242018 6 29

出版物シリーズ

名前AIP Conference Proceedings
2130
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Conference

Conference13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018
国/地域United States
CityPortsmouth
Period18/6/2418/6/29

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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