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First measurement of the Λ-Ξ interaction in proton-proton collisions at the LHC

The first experimental information on the strong interaction between Λ and Ξ− strange baryons is presented in this Letter. The correlation function of Λ-Ξ− and Λ‾-Ξ‾+ pairs produced in high-multiplicity proton-proton (pp) collisions at s=13 TeV at the LHC is measured as a function of the relative mo...

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Main Authors: Acharya, Shreyasi (Author) , Angelov, Venelin (Author) , Berdnikova, Anastasia (Author) , Bergmann, Luisa (Author) , Danisch, Meike (Author) , Feuillard, Victor (Author) , Fokin, Ilya D. (Author) , Glässel, Peter (Author) , Kroesen, Martin (Author) , Nath, Abhishek (Author) , Pachmayer, Yvonne C. (Author) , Reygers, Klaus (Author) , Schicker, Rainer (Author) , Skorodumovs, Georgijs (Author) , Stachel, Johanna (Author) , Stiefelmaier, Stephan (Author) , Veen, Casper Arie van (Author) , Völkl, Martin (Author) , Windelband, Bernd (Author) , Yüncü, Alperen (Author) , Zanone, Federica (Author)
Corporate Author: ALICE (Author)
Format: Article (Journal)
Language:English
Published: 10 September 2023
In: Physics letters
Year: 2023, Volume: 844, Pages: 1-13
ISSN:1873-2445
DOI:10.1016/j.physletb.2022.137223
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1016/j.physletb.2022.137223
Verlag, kostenfrei, Volltext: https://www.sciencedirect.com/science/article/pii/S0370269322003574
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Author Notes:ALICE Collaboration*
Description
Summary:The first experimental information on the strong interaction between Λ and Ξ− strange baryons is presented in this Letter. The correlation function of Λ-Ξ− and Λ‾-Ξ‾+ pairs produced in high-multiplicity proton-proton (pp) collisions at s=13 TeV at the LHC is measured as a function of the relative momentum of the pair. The femtoscopy method is used to calculate the correlation function, which is then compared with theoretical expectations obtained using a meson exchange model, chiral effective field theory, and Lattice QCD calculations close to the physical point. Data support predictions of small scattering parameters while discarding versions with large ones, thus suggesting a weak Λ-Ξ− interaction. The limited statistical significance of the data does not yet allow one to constrain the effects of coupled channels like Σ-Ξ and N-Ω.
Item Description:Online verfügbar: 3. Juni 2022, Artikelversion: 21. August 2023
*ALICE Collaboration: S. Acharya, V. Anguelov, A. Berdnikova, L. Bergmann, M.C. Danisch, V.J.G. Feuillard, I. Fokin, P. Glässel, M. Kroesen, A. Nath, Y. Pachmayer, K. Reygers, R. Schicker, G. Skorodumovs, J. Stachel, S.F. Stiefelmaier, C.A. van Veen, M.A. Völkl, B. Windelband, A. Yuncu, F. Zanone [und 1015 weitere Personen]
Gesehen am 13.02.2024
Physical Description:Online Resource
ISSN:1873-2445
DOI:10.1016/j.physletb.2022.137223

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