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Measurement of K̄ N scattering below the K̄ N mass threshold

Noumi, H. ; Tatsuno, H. LU and Zmeskal, J. (2024) MESON 2023 – 17th International Workshop on Meson Physics In EPJ Web of Conferences 291.
Abstract
We measured πΣ invariant mass spectra below and above the K̄N mass threshold in the K-d → NπΣ reaction in order to study the K̄N interaction and the Λ(1405) resonance. This reaction can be described by the two-step process: (i) K-N1 → K̄N followed by (ii) K̄N2 → πΣ, where N1 and N2 are nucleons bound in the deuteron. We deduced the S -wave scattering amplitude of K̄N → K̄N as well as K̄N → πΣ in I = 0 in the framework of the K̄N-πΣ coupled channel so as to reproduce the observed πΣ spectra in the I = 0 channel. We found a resonance pole at 1417.7+6.0-7.4(fitting error)+1.1-1.0(systematic error).i[26.9+6.0-7.9(fitting error)+1.7-2.0(systematic error)] MeV/c2 © 2024 The Authors, published by EDP Sciences.
Please use this url to cite or link to this publication:
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publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
EPJ Web of Conferences : MESON 2023 – 17th International Workshop on Meson Physics - MESON 2023 – 17th International Workshop on Meson Physics
series title
EPJ Web of Conferences
editor
Lalik, R.
volume
291
article number
05011
conference name
MESON 2023 – 17th International Workshop on Meson Physics
conference location
Kraków, Poland
conference dates
2023-06-22 - 2023-06-27
external identifiers
  • scopus:85212191527
ISSN
2100-014X
DOI
10.1051/epjconf/202429105011
language
English
LU publication?
yes
id
ad81a548-1212-4b9d-aa3a-0960f79436dc
date added to LUP
2025-12-03 08:16:25
date last changed
2025-12-03 08:17:20
@inproceedings{ad81a548-1212-4b9d-aa3a-0960f79436dc,
  abstract     = {{We measured πΣ invariant mass spectra below and above the K̄N mass threshold in the K-d → NπΣ reaction in order to study the K̄N interaction and the Λ(1405) resonance. This reaction can be described by the two-step process: (i) K-N1 → K̄N followed by (ii) K̄N2 → πΣ, where N1 and N2 are nucleons bound in the deuteron. We deduced the S -wave scattering amplitude of K̄N → K̄N as well as K̄N → πΣ in I = 0 in the framework of the K̄N-πΣ coupled channel so as to reproduce the observed πΣ spectra in the I = 0 channel. We found a resonance pole at 1417.7+6.0-7.4(fitting error)+1.1-1.0(systematic error).i[26.9+6.0-7.9(fitting error)+1.7-2.0(systematic error)] MeV/c2 © 2024 The Authors, published by EDP Sciences.}},
  author       = {{Noumi, H. and Tatsuno, H. and Zmeskal, J.}},
  booktitle    = {{EPJ Web of Conferences : MESON 2023 – 17th International Workshop on Meson Physics}},
  editor       = {{Lalik, R.}},
  issn         = {{2100-014X}},
  language     = {{eng}},
  series       = {{EPJ Web of Conferences}},
  title        = {{Measurement of K̄ N scattering below the K̄ N mass threshold}},
  url          = {{http://dx.doi.org/10.1051/epjconf/202429105011}},
  doi          = {{10.1051/epjconf/202429105011}},
  volume       = {{291}},
  year         = {{2024}},
}