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@MISC{Collaboration:356862,
      author       = {{ALICE Collaboration}},
      title        = {{I}nvestigating the nature of the {K}$^*_0(700)$ state with
                      $\pi^\pm${K}$^0_{\rm {S}}$ correlations at the {LHC}},
      reportid     = {GSI-2025-00245},
      year         = {2024},
      note         = {Journal Article GSI record: GSI-2025-00244},
      abstract     = {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.},
      cin          = {ALI / DTL / CIT / EXM / ALICE@CERN},
      cid          = {I:(DE-Ds200)ALI-20080822OR105 /
                      I:(DE-Ds200)DTL-20051214OR031 /
                      I:(DE-Ds200)CIT-20110310OR121 /
                      I:(DE-Ds200)EXM-20080818OR100 / I:(DE-Ds200)Coll-CERN-ALICE},
      pnm          = {612 - Cosmic Matter in the Laboratory (POF4-612) / HGS-HIRe
                      - HGS-HIRe for FAIR (HGS-HIRe) / SUC-GSI-Heidelberg -
                      Strategic university cooperation GSI-U Heidelberg
                      (SUC-GSI-HE) / SUC-GSI-Frankfurt - Strategic university
                      cooperation GSI-U Frankfurt/M (SUC-GSI-FR) /
                      SUC-GSI-Darmstadt - Strategic university cooperation GSI-TU
                      Darmstadt (SUC-GSI-DA) / STRONG-2020 - The strong
                      interaction at the frontier of knowledge: fundamental
                      research and applications (824093)},
      pid          = {G:(DE-HGF)POF4-612 / G:(DE-Ds200)HGS-HIRe /
                      G:(DE-Ds200)SUC-GSI-HE / G:(DE-Ds200)SUC-GSI-FR /
                      G:(DE-Ds200)SUC-GSI-DA / G:(EU-Grant)824093},
      experiment   = {EXP:(DE-H253)LHC-Exp-ALICE-20150101},
      typ          = {PUB:(DE-HGF)32},
      doi          = {10.17182/HEPDATA.153749},
      url          = {https://repository.gsi.de/record/356862},
}