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Study of the interaction between Ξ baryons and light mesons via femtoscopy at the LHC

Abualrob, I.J. ; Christiansen, P. LU ; Hansen, J. LU orcid ; Iversen, K.E. LU orcid ; Nepeivoda, R. LU orcid ; Ohlson, A. LU ; Panasenko, I. LU ; Silvermyr, D. LU orcid ; Staa, J. LU and Zurlo, N. (2026) In Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 874.
Abstract
Meson-baryon systems with strangeness content provide a unique laboratory for investigating the strong interaction and testing theoretical models of hadron structure and dynamics. In this work, the measured correlation functions for oppositely charged Ξ-K and Ξ−π pairs obtained in high-multiplicity pp collisions at s=13 TeV at the LHC are presented. For the first time, high-precision data on the Ξ-K interaction are delivered at small relative momenta. The scattering lengths, extracted via the Lednický–Lyuboshits expression of the pair wavefunction, indicate a repulsive and a shallow attractive strong interaction for the Ξ-K and Ξ−π systems, respectively. The Ξ(1620) and Ξ(1690) states are observed in the Ξ−π correlation function and their... (More)
Meson-baryon systems with strangeness content provide a unique laboratory for investigating the strong interaction and testing theoretical models of hadron structure and dynamics. In this work, the measured correlation functions for oppositely charged Ξ-K and Ξ−π pairs obtained in high-multiplicity pp collisions at s=13 TeV at the LHC are presented. For the first time, high-precision data on the Ξ-K interaction are delivered at small relative momenta. The scattering lengths, extracted via the Lednický–Lyuboshits expression of the pair wavefunction, indicate a repulsive and a shallow attractive strong interaction for the Ξ-K and Ξ−π systems, respectively. The Ξ(1620) and Ξ(1690) states are observed in the Ξ−π correlation function and their properties, mass and width, are determined. These measurements are in agreement with other available results. Such high-precision data can help refine the understanding of these resonant states, provide stronger constraints for chirally motivated potentials, and address the key challenge of describing the coupled-channel dynamics that may give rise to molecular configurations. © 2026 The Authors. (Less)
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publication status
published
subject
keywords
Femtoscopy, Meson-baryon interaction, Molecular states, Strangeness, Strong interaction
in
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
874
article number
140227
publisher
Elsevier
external identifiers
  • scopus:105031798664
ISSN
0370-2693
DOI
10.1016/j.physletb.2026.140227
language
English
LU publication?
yes
id
e45318a3-b980-42f1-b64b-da58bea5dfa5
date added to LUP
2026-04-02 10:06:50
date last changed
2026-04-02 10:07:28
@article{e45318a3-b980-42f1-b64b-da58bea5dfa5,
  abstract     = {{Meson-baryon systems with strangeness content provide a unique laboratory for investigating the strong interaction and testing theoretical models of hadron structure and dynamics. In this work, the measured correlation functions for oppositely charged Ξ-K and Ξ−π pairs obtained in high-multiplicity pp collisions at s=13 TeV at the LHC are presented. For the first time, high-precision data on the Ξ-K interaction are delivered at small relative momenta. The scattering lengths, extracted via the Lednický–Lyuboshits expression of the pair wavefunction, indicate a repulsive and a shallow attractive strong interaction for the Ξ-K and Ξ−π systems, respectively. The Ξ(1620) and Ξ(1690) states are observed in the Ξ−π correlation function and their properties, mass and width, are determined. These measurements are in agreement with other available results. Such high-precision data can help refine the understanding of these resonant states, provide stronger constraints for chirally motivated potentials, and address the key challenge of describing the coupled-channel dynamics that may give rise to molecular configurations. © 2026 The Authors.}},
  author       = {{Abualrob, I.J. and Christiansen, P. and Hansen, J. and Iversen, K.E. and Nepeivoda, R. and Ohlson, A. and Panasenko, I. and Silvermyr, D. and Staa, J. and Zurlo, N.}},
  issn         = {{0370-2693}},
  keywords     = {{Femtoscopy; Meson-baryon interaction; Molecular states; Strangeness; Strong interaction}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics}},
  title        = {{Study of the interaction between Ξ baryons and light mesons via femtoscopy at the LHC}},
  url          = {{http://dx.doi.org/10.1016/j.physletb.2026.140227}},
  doi          = {{10.1016/j.physletb.2026.140227}},
  volume       = {{874}},
  year         = {{2026}},
}