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@ARTICLE{Du:905852,
      author       = {Du, Meng-Lin and Baru, Vadim and Dong, Xiang-Kun and Filin,
                      Arseniy and Guo, Feng-Kun and Hanhart, Christoph and
                      Nefediev, Alexey and Nieves, Juan and Wang, Qian},
      title        = {{C}oupled-channel approach to {T} c c + including
                      three-body effects},
      journal      = {Physical review / D},
      volume       = {105},
      number       = {1},
      issn         = {2470-0010},
      address      = {[S.l.]},
      publisher    = {Soc.},
      reportid     = {FZJ-2022-01059},
      pages        = {014024},
      year         = {2022},
      abstract     = {A coupled-channel approach is applied to the charged
                      tetraquark state T+cc recently discovered by the LHCb
                      Collaboration. The parameters of the interaction are fixed
                      by a fit to the observed line shape in the three-body
                      D0D0π+ channel. Special attention is paid to the three-body
                      dynamics in the T+cc due to the finite life time of the
                      D∗. An approach to the T+cc is argued to be
                      self-consistent only if both manifestations of the
                      three-body dynamics, the pion exchange between the D and
                      D∗ mesons and the finite D∗ width, are taken into
                      account simultaneously to ensure that three-body unitarity
                      is preserved. This is especially important to precisely
                      extract the pole position in the complex energy plane whose
                      imaginary part is very sensitive to the details of the
                      coupled-channel scheme employed. The D0D0 and D0D+ invariant
                      mass distributions, predicted based on this analysis, are in
                      good agreement with the LHCb data. The low-energy expansion
                      of the D∗D scattering amplitude is performed and the
                      low-energy constants (the scattering length and effective
                      range) are extracted. The compositeness parameter of the
                      T+cc is found to be close to unity, which implies that the
                      T+cc is a hadronic molecule generated by the interactions in
                      the D*+D0 and D*0D+ channels. Employing heavy-quark spin
                      symmetry, an isoscalar D∗D∗ molecular partner of the
                      T+cc with JP=1+ is predicted under the assumption that the
                      DD∗−D∗D∗ coupled-channel effects can be neglected.},
      cin          = {IAS-4 / IKP-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-4-20090406 / I:(DE-Juel1)IKP-3-20111104},
      pnm          = {5111 - Domain-Specific Simulation Data Life Cycle Labs
                      (SDLs) and Research Groups (POF4-511) / DFG project
                      196253076 - TRR 110: Symmetrien und Strukturbildung in der
                      Quantenchromodynamik (196253076)},
      pid          = {G:(DE-HGF)POF4-5111 / G:(GEPRIS)196253076},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000747425300003},
      doi          = {10.1103/PhysRevD.105.014024},
      url          = {https://juser.fz-juelich.de/record/905852},
}