{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.153749.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2739149"}},{"@id":"https://doi.org/10.1016/j.physletb.2024.138915","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ALICE Collaboration"},"creator":{"@type":"Organization","name":"ALICE Collaboration"},"datePublished":"2024","description":"Investigating the nature of the K$^*_0(700)$ state with $\\pi^\\pm$ K$^0_{\\rm S}$ correlations at the LHC. -- The first measurements of femtoscopic correlations with the particle pair combinations $\\pi^\\pm$ K$^0_{\\rm S}$ in pp collisions at $\\sqrt{s}=13$ TeV at the Large Hadron Collider are reported by the ALICE experiment. Using the femtoscopic approach, it is shown that it is possible to  study the elusive K$^*_0(700)$ particle that has been considered a tetraquark candidate for over forty years. Boson source parameters and final-state interaction parameters are extracted by fitting a model assuming a Gaussian source to the experimentally measured two-particle correlation functions. The final-state interaction is modeled through a resonant scattering amplitude, defined in terms of a mass and a coupling parameter, decaying into a  $\\pi^\\pm$K$^0_{\\rm S}$ pair. The extracted mass and Breit--Wigner width, derived from the coupling parameter, of the final-state interaction are found to be consistent with previous measurements of the K$^*_0(700)$. The small value and increasing behavior of the correlation strength with increasing source size support the hypothesis that the K$^*_0(700)$ is a four-quark state, i.e. a tetraquark state. This latter trend is also confirmed via a simple geometric model that assumes a tetraquark structure of the K$^*_0(700)$ resonance.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.153749.v1/t1","@type":"Dataset","description":"Experimental $C(k^*)$, 0-100% mult. class, $k_{\\rm T}>0$.","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.153749.v1/t2","@type":"Dataset","description":"PYTHIA $C(k^*)$, 0-100% mult. class, $k_{\\rm T}>0$.","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.153749.v1/t3","@type":"Dataset","description":"Experimental $C(k^*)$, 0-100% mult. class, $k_{\\rm T}<0.5$ GeV/$c$.","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.153749.v1/t4","@type":"Dataset","description":"PYTHIA $C(k^*)$, 0-100% mult. class, $k_{\\rm T}<0.5$ GeV/$c$.","name":"Table 4"},{"@id":"https://doi.org/10.17182/hepdata.153749.v1/t5","@type":"Dataset","description":"Experimental $C(k^*)$, 0-5% mult. class, $k_{\\rm T}<0.5$ GeV/$c$.","name":"Table 5"},{"@id":"https://doi.org/10.17182/hepdata.153749.v1/t6","@type":"Dataset","description":"PYTHIA $C(k^*)$, 0-5% mult. class, $k_{\\rm T}<0.5$ GeV/$c$.","name":"Table 6"},{"@id":"https://doi.org/10.17182/hepdata.153749.v1/t7","@type":"Dataset","description":"$C'(k^*)$, 0-100% mult. class, $k_{\\rm T}>0$.","name":"Table 7"},{"@id":"https://doi.org/10.17182/hepdata.153749.v1/t8","@type":"Dataset","description":"$C'(k^*)$, 0-100% mult. class, $k_{\\rm T}<0.5$ GeV/$c$.","name":"Table 8"},{"@id":"https://doi.org/10.17182/hepdata.153749.v1/t9","@type":"Dataset","description":"$C'(k^*)$, 0-5% mult. class, $k_{\\rm T}<0.5$ GeV/$c$.","name":"Table 9"},{"@id":"https://doi.org/10.17182/hepdata.153749.v1/t10","@type":"Dataset","description":"$C'(k^*)-\\epsilon\\frac{dN_{\\rm BW}}{dk^*}$, 0-100% mult. class, $k_{\\rm T}>0$.","name":"Table 10"},{"@id":"https://doi.org/10.17182/hepdata.153749.v1/t11","@type":"Dataset","description":"$C'(k^*)-\\epsilon\\frac{dN_{\\rm BW}}{dk^*}$, 0-100% mult. class, $k_{\\rm T}<0.5$ GeV/$c$.","name":"Table 11"},{"@id":"https://doi.org/10.17182/hepdata.153749.v1/t12","@type":"Dataset","description":"$C'(k^*)-\\epsilon\\frac{dN_{\\rm BW}}{dk^*}$, 0-5% mult. class, $k_{\\rm T}<0.5$ GeV/$c$.","name":"Table 12"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2739149?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/153749"}],"inLanguage":"en","name":"Investigating the nature of the K$^*_0(700)$ state with $\\pi^\\pm$K$^0_{\\rm S}$ correlations at the LHC","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2739149?version=1","version":1}