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 Jung; Shunsuke 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

doi:10.1063/1.5118414

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 Jung

Shunsuke 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

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

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 B_K ≳ 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.

Original language	English
Title of host publication	13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018
Editors	Reinhard Schumacher, Liguang Tang
Publisher	American Institute of Physics Inc.
ISBN (Electronic)	9780735418721
DOIs	https://doi.org/10.1063/1.5118414
Publication status	Published - 2019 Jul 25
Event	13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018 - Portsmouth, United States Duration: 2018 Jun 24 → 2018 Jun 29

Publication series

Name	AIP Conference Proceedings
Volume	2130
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018
Country/Territory	United States
City	Portsmouth
Period	18/6/24 → 18/6/29

Bibliographical note

Publisher Copyright:
© 2019 Author(s).

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1063/1.5118414

Cite this

Ichikawa, Y., Yamagata-Sekihara, J., Ahn, J. K., Akazawa, Y., Aoki, K., Bottta, E., Ekawa, H., Evtoukhovitch, P., Feliciello, A., Fujita, M., Gogami, T., Hasegawa, S., Hasegawa, T., Hayakawa, S., Hayakawa, T., Hirenzaki, S., Honda, R., Hosomi, K., Imai, KI., ... Yamamoto, T. O. (2019). K̄ and nucleus system studied by ¹²C(K ^-, p) spectrum. In R. Schumacher, & L. Tang (Eds.), 13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018 Article 040017 (AIP Conference Proceedings; Vol. 2130). American Institute of Physics Inc.. https://doi.org/10.1063/1.5118414

K̄ and nucleus system studied by ¹²C(K ^-, p) spectrum. / Ichikawa, Yudai; Yamagata-Sekihara, Junko; Ahn, Jung Keun et al.
13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018. ed. / Reinhard Schumacher; Liguang Tang. American Institute of Physics Inc., 2019. 040017 (AIP Conference Proceedings; Vol. 2130).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Ichikawa, Y, Yamagata-Sekihara, J, Ahn, JK, Akazawa, Y, Aoki, K, Bottta, E, Ekawa, H, Evtoukhovitch, P, Feliciello, A, Fujita, M, Gogami, T, Hasegawa, S, Hasegawa, T, Hayakawa, S, Hayakawa, T, Hirenzaki, S, Honda, R, Hosomi, K, Imai, KI, Jung, W, Kanatsuki, S, Kim, S, Kinbara, S, Kobayashi, K, Lee, J, Marcello, S, Miwa, K, Moon, T, Nagae, T, Nakada, Y, Nakagawa, M, Nanamura, T, Naruki, M, Sakaguchi, A, Sako, H, Sato, S, Sasaki, Y, Shirotori, K, Sugimura, H, Takahashi, T, Tamura, H, Tanida, K, Tsamalaidze, Z, Ukai, M & Yamamoto, TO 2019, K̄ and nucleus system studied by ¹²C(K ^-, p) spectrum. in R Schumacher & L Tang (eds), 13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018., 040017, AIP Conference Proceedings, vol. 2130, American Institute of Physics Inc., 13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018, Portsmouth, United States, 18/6/24. https://doi.org/10.1063/1.5118414

@inproceedings{98303fdccf884f7087e91c1e9588d35b,

title = "{\=K} and nucleus system studied by 12C(K -, p) spectrum",

abstract = "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 {\=K}-nucleus interaction. In this comparison, we have changed the depth of both real and imaginary parts of the optical potential between the {\=K} 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.",

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

note = "Publisher Copyright: {\textcopyright} 2019 Author(s).; 13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018 ; Conference date: 24-06-2018 Through 29-06-2018",

year = "2019",

month = jul,

day = "25",

doi = "10.1063/1.5118414",

language = "English",

series = "AIP Conference Proceedings",

publisher = "American Institute of Physics Inc.",

editor = "Reinhard Schumacher and Liguang Tang",

booktitle = "13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018",

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T1 - K̄ and nucleus system studied by 12C(K -, p) spectrum

AU - Ichikawa, Yudai

AU - Yamagata-Sekihara, Junko

AU - Ahn, Jung Keun

AU - Akazawa, Yuya

AU - Aoki, Kanae

AU - Bottta, Elena

AU - Ekawa, Hiroyuki

AU - Evtoukhovitch, Petr

AU - Feliciello, Alessandro

AU - Fujita, Manami

AU - Gogami, Toshiyuki

AU - Hasegawa, Shoichi

AU - Hasegawa, Tomoyuki

AU - Hayakawa, Shuhei

AU - Hayakawa, Tomonori

AU - Hirenzaki, Satoru

AU - Honda, Ryotaro

AU - Hosomi, Kenji

AU - Imai, Ken'Ichi

AU - Jung, Wooseung

AU - Kanatsuki, Shunsuke

AU - Kim, Shinhyung

AU - Kinbara, Sinji

AU - Kobayashi, Kazuya

AU - Lee, Jaeyong

AU - Marcello, Simonetta

AU - Miwa, Koji

AU - Moon, Taejin

AU - Nagae, Tomofumi

AU - Nakada, Yoshiyuki

AU - Nakagawa, Manami

AU - Nanamura, Takuya

AU - Naruki, Megumi

AU - Sakaguchi, Atsushi

AU - Sako, Hiroyuki

AU - Sato, Susumu

AU - Sasaki, Yuki

AU - Shirotori, Kotaro

AU - Sugimura, Hitoshi

AU - Takahashi, Toshiyuki

AU - Tamura, Hirokazu

AU - Tanida, Kiyoshi

AU - Tsamalaidze, Zviadi

AU - Ukai, Mifuyu

AU - Yamamoto, Takeshi O.

PY - 2019/7/25

Y1 - 2019/7/25

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85070310118

U2 - 10.1063/1.5118414

DO - 10.1063/1.5118414

M3 - Conference contribution

AN - SCOPUS:85070310118

T3 - AIP Conference Proceedings

BT - 13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018

A2 - Schumacher, Reinhard

A2 - Tang, Liguang

PB - American Institute of Physics Inc.

T2 - 13th International Conference on Hypernuclear and Strange Particle Physics, HYP 2018

Y2 - 24 June 2018 through 29 June 2018

ER -