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@ARTICLE{Hayrapetyan:632644,
      author       = {Hayrapetyan, Aram and others},
      collaboration = {{CMS Collaboration}},
      title        = {{D}etermination of the spin and parity of all-charm
                      tetraquarks},
      reportid     = {PUBDB-2025-02210, arXiv:2506.07944. CMS-BPH-24-002.
                      CERN-EP-2025-118},
      year         = {2025},
      note         = {Submitted to Nature. All figures and tables can be found at
                      http://cms-results.web.cern.ch/cms-results/public-results/publications/BPH-24-002
                      (CMS Public Pages)},
      abstract     = {The traditional quark model accounts for the existence of
                      baryons, such as protons and neutrons, which consist of
                      three quarks, as well as mesons, composed of a
                      quark-antiquark pair. Only recently has substantial evidence
                      started to accumulate for exotic states composed of four or
                      five quarks and antiquarks. The exact nature of their
                      internal structure remains uncertain. This paper reports the
                      first measurement of quantum numbers of the recently
                      discovered family of three all-charm tetraquarks, using data
                      collected by the CMS experiment at the Large Hadron Collider
                      from 2016 to 2018. The angular analysis techniques developed
                      for the discovery and characterization of the Higgs boson
                      have been applied to the new exotic states. The quantum
                      numbers for parity $P$ and charge conjugation $C$ symmetries
                      are found to be +1. The spin $J$ of these exotic states is
                      consistent with 2$\hbar$, while 0$\hbar$ and 1$\hbar$ are
                      excluded at 95\% and 99\% confidence level, respectively.
                      The $J^{PC}=2^{++}$ assignment implies particular
                      configurations of constituent spins and orbital angular
                      momenta, which constrain the possible internal structure of
                      these tetraquarks.},
      cin          = {CMS},
      cid          = {I:(DE-H253)CMS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) /
                      HIDSS-0002 - DASHH: Data Science in Hamburg - Helmholtz
                      Graduate School for the Structure of Matter
                      $(2019_IVF-HIDSS-0002)$ / DFG project G:(GEPRIS)390833306 -
                      EXC 2121: Quantum Universe (390833306)},
      pid          = {G:(DE-HGF)POF4-611 / $G:(DE-HGF)2019_IVF-HIDSS-0002$ /
                      G:(GEPRIS)390833306},
      experiment   = {EXP:(DE-H253)LHC-Exp-CMS-20150101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2506.07944},
      howpublished = {arXiv:2506.07944},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2506.07944;\%\%$},
      doi          = {10.3204/PUBDB-2025-02210},
      url          = {https://bib-pubdb1.desy.de/record/632644},
}