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@ARTICLE{Aaij:474160,
      author       = {Aaij, Roel and others},
      collaboration = {{LHCb Collaboration}},
      title        = {{O}bservation of {N}ew {R}esonances {D}ecaying to ${J}/\psi
                      {K}^+$+ and ${J}/\psi \phi$},
      journal      = {Physical review letters},
      volume       = {127},
      number       = {8},
      issn         = {0031-9007},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PUBDB-2022-00550, arXiv:2103.01803. LHCb-PAPER-2020-044.
                      CERN-EP-2021-025},
      pages        = {082001},
      year         = {2021},
      note         = {Phys. Rev. Lett. 127, 082001 (2021). All figures and
                      tables, along with any supplementary material and additional
                      information, are available at
                      https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2020-044.html
                      (LHCb public pages)},
      abstract     = {The first observation of exotic states with a new quark
                      content $c\bar{c}u\bar{s}$ decaying to the $J/ψK^+$ final
                      state is reported with high significance from an amplitude
                      analysis of the $B^+ → J/ψϕK^+$ decay. The analysis is
                      carried out using proton-proton collision data corresponding
                      to a total integrated luminosity of 9 fb$^{-1}$ collected by
                      the LHCb experiment at center-of-mass energies of 7, 8, and
                      13 TeV. The most significant state, $Z_{cs}(4000)^+$, has a
                      mass of $4003±6_{-14}^{+4}$ MeV, a width of $131±15±26$
                      MeV, and spin parity $J_P = 1^+$, where the quoted
                      uncertainties are statistical and systematic, respectively.
                      A new $1^+ X(4685)$ state decaying to the J/ψϕ final state
                      is also observed with high significance. In addition, the
                      four previously reported $J/ψϕ$ states are confirmed and
                      two more exotic states, $Z_{cs}(4220)^+$ and $X(4630)$, are
                      observed with significance exceeding 5 standard deviations.},
      keywords     = {p p: scattering (INSPIRE) / p p: colliding beams (INSPIRE)
                      / resonance: production (INSPIRE) / mass: width (INSPIRE) /
                      spin: parity (INSPIRE) / B+: hadronic decay (INSPIRE) /
                      amplitude analysis (INSPIRE) / Dalitz plot (INSPIRE) /
                      error: statistical (INSPIRE) / particle: exotic (INSPIRE) /
                      mass spectrum: (J/psi(3100) K+) (INSPIRE) / mass spectrum:
                      (J/psi(3100) Phi(1020)) (INSPIRE) / phantom (INSPIRE) /
                      LHC-B (INSPIRE) / CERN LHC Coll (INSPIRE) / experimental
                      results (INSPIRE) / B+ --> J/psi(3100) K+ Phi(1020)
                      (INSPIRE) / 7000 GeV-cms (INSPIRE) / 8000 GeV-cms (INSPIRE)
                      / 13000 GeV-cms (INSPIRE)},
      cin          = {IT},
      ddc          = {530},
      cid          = {I:(DE-H253)IT-20120731},
      pnm          = {6G9 - IDAF (DESY) (POF4-6G9)},
      pid          = {G:(DE-HGF)POF4-6G9},
      experiment   = {EXP:(DE-H253)TIER-II-20150101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2103.01803},
      howpublished = {arXiv:2103.01803},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2103.01803;\%\%$},
      pubmed       = {pmid:34477418},
      UT           = {WOS:000686914400004},
      doi          = {10.1103/PhysRevLett.127.082001},
      url          = {https://bib-pubdb1.desy.de/record/474160},
}