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@ARTICLE{Baru:890808,
      author       = {Baru, V. and Epelbaum, E. and Filin, A. A. and Hanhart,
                      Christoph and Mizuk, R. V. and Nefediev, A. V. and Ropertz,
                      S.},
      title        = {{I}nsights into {Z} b ( 10610 ) and {Z} b ( 10650 ) from
                      dipion transitions from ϒ ( 10860 )},
      journal      = {Physical review / D},
      volume       = {103},
      number       = {3},
      issn         = {2470-0010},
      address      = {Melville, NY},
      publisher    = {Inst.812068},
      reportid     = {FZJ-2021-01216},
      pages        = {034016},
      year         = {2021},
      abstract     = {The dipion transitions Υ(10860)→π+π−Υ(nS) (n=1, 2,
                      3) are studied in the framework of a unitary and analytic
                      coupled-channel formalism previously developed for analyzing
                      experimental data on the bottomoniumlike states Zb(10610)
                      and Zb(10650) [Phys. Rev. D 98, 074023 (2018)] and
                      predicting the properties of their spin partners [Phys. Rev.
                      D 99, 094013 (2019)]. In this work we use a relatively
                      simple but realistic version of this approach, where the
                      scattering and production amplitudes are constructed
                      employing only short-ranged interactions between the open-
                      and hidden-flavor channels consistent with the constraints
                      from heavy quark spin symmetry, for an extended analysis of
                      the experimental line shapes. In particular, the transitions
                      from the Υ(10860) to the final states ππhb(mP) (m=1, 2)
                      and πB(*)¯B∗ already studied before, are now augmented
                      by the Υ(10860)→π+π−Υ(nS) final states (n=1, 2, 3).
                      This is achieved by employing dispersion theory to account
                      for the final state interaction of the ππ subsystem
                      including its coupling to the K¯K channel. Fits to the
                      two-dimensional Dalitz plots for the π+π−Υ final states
                      were performed. Two real subtraction constants are adjusted
                      to achieve the best description of the Dalitz plot for each
                      Υ(nS) (n=1, 2, 3) while all the parameters related to the
                      properties of the Zbs are kept fixed from the previous
                      study. A good overall description of the data for all
                      Υ(10860)→π+π−Υ(nS) channels achieved in this work
                      provides additional strong support for the molecular
                      interpretation of the Zb states.},
      cin          = {IAS-4 / IKP-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-4-20090406 / I:(DE-Juel1)IKP-3-20111104},
      pnm          = {511 - Enabling Computational- Data-Intensive Science and
                      Engineering (POF4-511) / DFG project 196253076 - TRR 110:
                      Symmetrien und Strukturbildung in der Quantenchromodynamik
                      (196253076)},
      pid          = {G:(DE-HGF)POF4-511 / G:(GEPRIS)196253076},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000620346700003},
      doi          = {10.1103/PhysRevD.103.034016},
      url          = {https://juser.fz-juelich.de/record/890808},
}