{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.131625.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1857549"}},{"@id":"https://doi.org/10.1016/j.physletb.2022.137272","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ALICE Collaboration"},"creator":{"@type":"Organization","name":"ALICE Collaboration"},"datePublished":"2022","description":"The interaction of $\\Lambda$ and $\\Sigma$ hyperons (Y) with nucleons (N) is strongly influenced by the coupled-channel dynamics. Due to the small mass difference of the N$\\Lambda$ and N$\\Sigma$ systems, the sizable coupling strength of the N$\\Sigma\\leftrightarrow$N$\\Lambda$ processes constitutes a crucial element in the determination of the N$\\Lambda$ interaction. In this letter we present the most precise measurements on the interaction of p$\\Lambda$ pairs, from zero relative momentum up to the opening of the N$\\Sigma$ channel. The correlation function in the relative momentum space for p$\\Lambda\\oplus\\overline{\\mathrm{p}}\\overline{\\Lambda}$ pairs measured in high-multiplicity triggered pp collisions at $\\sqrt{s}=13~$TeV at the LHC is reported. The opening of the inelastic N$\\Sigma$ channels is visible in the extracted correlation function as a cusp-like structure occurring at relative momentum {$k^*=289~$MeV$/c$}. This represents the first direct experimental observation of the N$\\Sigma\\rightarrow$N$\\Lambda$ coupled channel in the p$\\Lambda$ system. The correlation function is compared with recent chiral effective field theory calculations, based on different strengths of the N$\\Sigma\\leftrightarrow$N$\\Lambda$ transition potential. A weaker coupling, as possibly supported by the present measurement, would require a more repulsive three-body NN$\\Lambda$ interaction for a proper description of the $\\Lambda$ in-medium properties, which has implications on the nuclear equation of state and for the presence of hyperons inside neutron stars.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.131625.v1/t1","@type":"Dataset","description":"p-$\\Lambda$ correlation function in high-multiplicity pp collisions at $\\sqrt{s}=13$ TeV.","name":"Table 1"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1857549?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/131625"}],"inLanguage":"en","name":"Exploring the N$\\Lambda$-N$\\Sigma$ coupled system with high precision correlation techniques at the LHC","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1857549?version=1","version":1}