{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.143518.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2666805"}},{"@id":"https://doi.org/10.1016/j.physletb.2023.138145","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ALICE Collaboration"},"creator":{"@type":"Organization","name":"ALICE Collaboration"},"datePublished":"2023","description":"The interaction between $\\Lambda$ baryons and kaons/antikaons is a crucial part of the strangeness $S=0$ ($\\Lambda-\\mathrm{K}$) and $S=-2$ ($\\Lambda$-$\\mathrm{\\overline{K}}$) sector of the meson-baryon interaction at low energies and in the understanding of states such as the $\\Xi(1620)$, whose nature and properties are still rather unknown. Experimental data on $\\Lambda$-K and $\\Lambda$-$\\mathrm{\\overline{K}}$ systems are rather scarce, leading to large uncertainties and tension between the available theoretical predictions. Recently, measurements of two-particle correlations in small colliding systems such as p-p collisions at LHC provided a significant improvement in the knowledge of several hadron-hadron interactions, in particular when strange baryons and mesons are involved. Correlation functions of $\\Lambda - $K$^+\\oplus \\overline{\\Lambda} - $K$^-$ and $\\Lambda - $K$^-\\oplus \\overline{\\Lambda} - $K$^+$ pairs were measured in Pb-Pb collisions and provided for the first time experimental constraints on the scattering parameters of the underlying interactions. In this letter we extend the measurements to small colliding systems by presenting $\\Lambda - $K$^+\\oplus \\overline{\\Lambda} - $K$^-$ and $\\Lambda - $K$^-\\oplus \\overline{\\Lambda} - $K$^+$ correlations obtained in the high-multiplicity triggered sample in p-p collisions at $\\sqrt{s}=13$ TeV recorded by ALICE. The interaction for both pairs is modeled using the Lednicky-Lyuboshits analytical formula and the corresponding scattering parameters $Ref_0$, $Imf_0$ and $d_0$ are extracted by comparing the theoretical correlation to the data. A repulsive interaction for the $\\Lambda - $K$^+\\oplus \\overline{\\Lambda} - $K$^-$ system is found, which is in agreement with previous Pb-Pb results. The non-negligible $Imf_0$ indicates a significant coupling to inelastic channels, such as $\\pi$N and $\\Sigma$K. The $\\Lambda - $K$^+\\oplus \\overline{\\Lambda} - $K$^-$ correlations show the presence of several structures at relative momenta $k^\\ast$ above 200 MeV$/c$, compatible with the $\\Omega$, $\\Xi(1690)$ and $\\Xi(1820)$ resonances decaying into $\\Lambda-\\mathrm{K}^-$ pairs. The low $k^\\ast$ region in the $\\Lambda - $K$^-\\oplus \\overline{\\Lambda} - $K$^+$ also exhibits the presence of the $\\Xi(1620)$ state, expected to strongly couple to the measured pair. The $\\Lambda - $K$^-\\oplus \\overline{\\Lambda} - $K$^+$ interaction is hence modeled assuming a resonant contribution, through the formation of the $\\Xi(1620)$ state, and a non-resonant one, which dominates the intermediate $k^\\ast$ region. The extracted non-resonant scattering parameters are compatible with the Pb-Pb measurements and the extracted pole properties of the $\\Xi(1620)$ agree with the recent Belle measurement of $\\Xi(1620)\\rightarrow\\Xi\\pi$.\u00a0\nThe presented data allow to access the $\\Lambda - $K$^+\\oplus \\overline{\\Lambda} - $K$^-$ and $\\Lambda - $K$^-\\oplus \\overline{\\Lambda} - $K$^+$ interaction with an unprecedented precision and the first experimental observation of the $\\Xi(1620)$ decaying into the $\\Lambda-\\mathrm{K}^-$ channel.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.143518.v1/t1","@type":"Dataset","description":"$\\Lambda K^{-}$ correlation function in high-multiplicity pp collisions at $\\sqrt{s}=13$ TeV.","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.143518.v1/t2","@type":"Dataset","description":"$\\Lambda K^{+}$ correlation function in high-multiplicity pp collisions at $\\sqrt{s}=13$ TeV.","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.143518.v1/t3","@type":"Dataset","description":"$C_{background}$ correlation for $\\Lambda K^{+}$ correlation function in high-multiplicity pp collisions at $\\sqrt{s}=13$ TeV.","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.143518.v1/t4","@type":"Dataset","description":"$C_{background}$ correlation for $\\Lambda K^{-}$ correlation function in high-multiplicity pp collisions at $\\sqrt{s}=13$ TeV.","name":"Table 4"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2666805?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/143518"}],"inLanguage":"en","name":"Accessing the strong interaction between $\\Lambda$ baryons and charged kaons with the femtoscopy technique at the LHC","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2666805?version=1","version":1}