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K - Pp bound system at J-PARC

Sakuma, Fuminori ; Tatsuno, Hideyuki LU and Zmeskal, Johannes (2020) In AIP Conference Proceedings 2249(1).
Abstract
The K̄NN bound system, symbolically denoted as "K-pp", is the simplest K̄-nuclear bound system which has been widely discussed as a consequence of the strongly attractive K̄N interaction in I = 0 channels. Many theoretical works have pointed out the existence of the "K-pp" bound system, but the calculated properties such as the binding energy and the width spread out due to the uncertainty of the K̄N interaction below the K̄+N mass threshold. Experimentally, there are several reports on observation of a "K-pp" candidate with the binding energy of around 100 MeV, however, no definitive evidence was available so far. At J-PARC, we conducted a experimental search for the "K-pp" bound system using K- + 3He reaction at 1.0 GeV/c where the... (More)
The K̄NN bound system, symbolically denoted as "K-pp", is the simplest K̄-nuclear bound system which has been widely discussed as a consequence of the strongly attractive K̄N interaction in I = 0 channels. Many theoretical works have pointed out the existence of the "K-pp" bound system, but the calculated properties such as the binding energy and the width spread out due to the uncertainty of the K̄N interaction below the K̄+N mass threshold. Experimentally, there are several reports on observation of a "K-pp" candidate with the binding energy of around 100 MeV, however, no definitive evidence was available so far. At J-PARC, we conducted a experimental search for the "K-pp" bound system using K- + 3He reaction at 1.0 GeV/c where the "K-pp" is expected to be directly produced via the (K-, n) reaction. We finally observed a bound state below the K- +p+p mass threshold in the Λpn final state, which can be interpreted as the "K- pp" bound state. The possible existence of the "K- pp" state is discussed from both aspects of production and decay. © 2020 Author(s). (Less)
Please use this url to cite or link to this publication:
author
; and
author collaboration
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Proceedings of the 15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon
series title
AIP Conference Proceedings
volume
2249
issue
1
article number
020005
publisher
American Institute of Physics (AIP)
external identifiers
  • scopus:85089419627
ISSN
0094-243X
ISBN
978-0-7354-2008-3
DOI
10.1063/5.0008808
language
English
LU publication?
yes
id
2e82d2d0-3e64-4374-b646-854731accab8
date added to LUP
2020-08-24 10:57:00
date last changed
2023-12-04 19:12:37
@inproceedings{2e82d2d0-3e64-4374-b646-854731accab8,
  abstract     = {{The K̄NN bound system, symbolically denoted as "K-pp", is the simplest K̄-nuclear bound system which has been widely discussed as a consequence of the strongly attractive K̄N interaction in I = 0 channels. Many theoretical works have pointed out the existence of the "K-pp" bound system, but the calculated properties such as the binding energy and the width spread out due to the uncertainty of the K̄N interaction below the K̄+N mass threshold. Experimentally, there are several reports on observation of a "K-pp" candidate with the binding energy of around 100 MeV, however, no definitive evidence was available so far. At J-PARC, we conducted a experimental search for the "K-pp" bound system using K- + 3He reaction at 1.0 GeV/c where the "K-pp" is expected to be directly produced via the (K-, n) reaction. We finally observed a bound state below the K- +p+p mass threshold in the Λpn final state, which can be interpreted as the "K- pp" bound state. The possible existence of the "K- pp" state is discussed from both aspects of production and decay. © 2020 Author(s).}},
  author       = {{Sakuma, Fuminori and Tatsuno, Hideyuki and Zmeskal, Johannes}},
  booktitle    = {{Proceedings of the 15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon}},
  isbn         = {{978-0-7354-2008-3}},
  issn         = {{0094-243X}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{American Institute of Physics (AIP)}},
  series       = {{AIP Conference Proceedings}},
  title        = {{K - Pp bound system at J-PARC}},
  url          = {{http://dx.doi.org/10.1063/5.0008808}},
  doi          = {{10.1063/5.0008808}},
  volume       = {{2249}},
  year         = {{2020}},
}