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000356862 0247_ $$2doi$$a10.17182/HEPDATA.153749
000356862 037__ $$aGSI-2025-00245
000356862 041__ $$aEnglish
000356862 1001_ $$0P:(DE-HGF)0$$aALICE Collaboration$$b0$$eCorresponding author
000356862 245__ $$aInvestigating the nature of the K$^*_0(700)$ state with $\pi^\pm$K$^0_{\rm S}$ correlations at the LHC
000356862 260__ $$c2024
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000356862 500__ $$aJournal Article GSI record: GSI-2025-00244
000356862 520__ $$aInvestigating 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.
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000356862 7870_ $$0GSI-2025-00244$$aAcharya, Shreyasi et.al.$$dAmsterdam : North-Holland Publ., 2024$$iRelatedTo$$rarXiv:2312.12830 ; CERN-EP-2023-287$$tInvestigating the composition of the $K_0^⁎(700)$ state with $π±K_S^0$ correlations at the LHC
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