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K - Pp bound system at J-PARC
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- Sakuma, Fuminori (author)
- RIKEN Atomic, Molecular and Optical Physics Laboratory (AMO)
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- Tatsuno, Hideyuki (author)
- Lund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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- Zmeskal, Johannes (author)
- Stefan Meyer Institute for Subatomic Physics (SMI)
- (creator_code:org_t)
- et al
- AIP Publishing, 2020
- 2020
- English.
- In: Proceedings of the 15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon. - : AIP Publishing. - 0094-243X. - 9780735420083 ; 2249:1
- Conference paper (peer-reviewed)
Abstract
Subject headings
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- 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).
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
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- kon (subject category)
- ref (subject category)
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