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@ARTICLE{Du:903225,
      author       = {Du, Meng-Lin and Baru, Vadim and Guo, Feng-Kun and Hanhart,
                      Christoph and Meissner, Ulf-G. and Oller, José A. and Wang,
                      Qian},
      title        = {{R}evisiting the nature of the {P}c pentaquarks},
      journal      = {Journal of high energy physics},
      volume       = {2021},
      number       = {8},
      issn         = {1029-8479},
      address      = {[Trieste]},
      publisher    = {SISSA},
      reportid     = {FZJ-2021-04932},
      pages        = {157},
      year         = {2021},
      abstract     = {The nature of the three narrow hidden-charm pentaquark Pc
                      states, i.e., Pc(4312), Pc(4440) and Pc(4457), is under
                      intense discussion since their discovery from the updated
                      analysis of the process Λ0b→J/ψpK− by LHCb. In this
                      work we extend our previous coupled-channel approach [Phys.
                      Rev. Lett. 124, 072001 (2020)], in which the Pc states are
                      treated as Σ(∗)cD¯¯¯¯(∗) molecules, by including
                      the ΛcD¯¯¯¯(∗) and ηcp as explicit inelastic
                      channels in addition to the J/ψp, as required by unitarity
                      and heavy quark spin symmetry (HQSS), respectively. Since
                      inelastic parameters are very badly constrained by the
                      current data, three calculation schemes are considered: (a)
                      scheme I with pure contact interactions between the elastic,
                      i.e., Σ(∗)cD¯¯¯¯(∗), and inelastic channels and
                      without the ΛcD¯¯¯¯(∗) interactions, (b) scheme II,
                      where the one-pion exchange (OPE) is added to scheme I, and
                      (c) scheme III, where the ΛcD¯¯¯¯(∗) interactions are
                      included in addition. It is shown that to obtain cutoff
                      independent results, OPE in the multichannel system is to be
                      supplemented with S-wave-to-D-wave mixing contact terms. As
                      a result, in line with our previous analysis, we demonstrate
                      that the experimental data for the J/ψp invariant mass
                      distribution are consistent with the interpretation of the
                      Pc(4312) and Pc(4440)/Pc(4457) as ΛcD¯¯¯¯ and
                      ΣcD¯¯¯¯∗ hadronic molecules, respectively, and that
                      the data show clear evidence for a new narrow state,
                      Pc(4380), identified as a Σ∗cD¯¯¯¯ molecule, which
                      should exist as a consequence of HQSS. While two
                      statistically equally good solutions are found in scheme I,
                      only one of these solutions with the quantum numbers of the
                      Pc(4440) and Pc(4457) being JP = 3/2− and 1/2−,
                      respectively, survives the requirement of regulator
                      independence once the OPE is included. Moreover, we predict
                      the line shapes in the elastic and inelastic channels and
                      demonstrate that those related to the Pc(4440) and the
                      Pc(4457) in the Σ(∗)cD¯¯¯¯ and ηcp mass
                      distributions from Λ0b→Σ(∗)cD¯¯¯¯K− and
                      Λ0b→ηcpK− will shed light on the quantum numbers of
                      those states, once the data are available. We also
                      investigate possible pentaquark signals in the
                      ΛcD¯¯¯¯(∗) final states.},
      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:000693090600001},
      doi          = {10.1007/JHEP08(2021)157},
      url          = {https://juser.fz-juelich.de/record/903225},
}