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@ARTICLE{Gregory:1047365,
      author       = {Gregory, Eric and Guo, Feng-Kun and Hanhart, Christoph and
                      Krieg, Stefan and Luu, Thomas},
      title        = {{E}xclusion of a diquark–anti-diquark structure for the
                      lightest positive-parity charmed mesons},
      journal      = {The European physical journal / A},
      volume       = {61},
      number       = {10},
      issn         = {1434-6001},
      address      = {Heidelberg},
      publisher    = {Springer},
      reportid     = {FZJ-2025-04259},
      pages        = {226},
      year         = {2025},
      abstract     = {The nature of low-lying scalar and axial-vector charmed
                      mesons has been debated for decades, with hadronic molecular
                      and compact tetraquark models being prominent candidates.
                      These two models predict quite different features for the
                      accessible SU(3) multiplets in the scalar and axial-vector
                      sectors, which can be tested through lattice calculations at
                      SU(3) symmetric points. In this work, we perform lattice
                      calculations for both scalar and axial-vector charmed mesons
                      with an SU(3) symmetric pion mass about 613 MeV for the
                      SU(3) [6] and [15] multiplets. We find that the [6]
                      multiplet exhibits attractive interactions in both scalar
                      and axial-vector sectors, while the [15] multiplet shows
                      repulsive interactions in both sectors. The energy shifts in
                      the scalar and axial-vector sectors are compatible with each
                      other within uncertainties. These results are fully
                      consistent with the hadronic molecular picture, while
                      challenging the compact tetraquark model, which predicts the
                      existence of low-lying [15] states in the axial-vector
                      sector but not in the scalar sector.},
      cin          = {JSC / IAS-4},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JSC-20090406 / I:(DE-Juel1)IAS-4-20090406},
      pnm          = {5111 - Domain-Specific Simulation $\&$ Data Life Cycle Labs
                      (SDLs) and Research Groups (POF4-511) / DFG project
                      G:(GEPRIS)511713970 - SFB 1639: NuMeriQS: Numerische
                      Methoden zur Untersuchung von Dynamik und Strukturbildung in
                      Quantensystemen (511713970) / NRW-FAIR (NW21-024-A) / AIDAS
                      - Joint Virtual Laboratory for AI, Data Analytics and
                      Scalable Simulation $(aidas_20200731)$ / BMBF 01 1H1 6013,
                      NRW 325 – 8.03 – 133340 - SiVeGCS (DB001492)},
      pid          = {G:(DE-HGF)POF4-5111 / G:(GEPRIS)511713970 /
                      G:(NRW)NW21-024-A / $G:(DE-Juel-1)aidas_20200731$ /
                      G:(DE-Juel-1)DB001492},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1140/epja/s10050-025-01665-8},
      url          = {https://juser.fz-juelich.de/record/1047365},
}