% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Hayrapetyan:643084,
      author       = {Hayrapetyan, Aram and others},
      collaboration = {{CMS Collaboration}},
      title        = {{C}haracterization of the quantum state of top quark pairs
                      produced in proton-proton collisions at $\sqrt{s}$ = 13
                      {T}e{V} using the beam and helicity bases},
      reportid     = {PUBDB-2025-05828, arXiv:2512.17557. CMS-TOP-25-016.
                      CERN-EP-2025-287},
      year         = {2025},
      note         = {Submitted to Physical Review D. All figures and tables can
                      be found at
                      http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-25-016
                      (CMS Public Pages)},
      abstract     = {Measurements of the spin correlation coefficients in the
                      beam basis are presented for top quark-antiquark
                      ($\mathrm{t\bar{t}}$) systems produced in proton-proton
                      collisions at $\sqrt{s}$ = 13 TeV collected by the CMS
                      experiment in 2016$-$2018, and corresponding to an
                      integrated luminosity of 138 fb$^{-1}$. The
                      $\mathrm{t\bar{t}}$ system is reconstructed from final
                      states containing an electron or muon, and jets. Together
                      with the previously reported results in the helicity basis,
                      these measurements are used to decompose the system into the
                      Bell and spin eigenstates in various kinematic regions. The
                      spin correlation coefficients are also used to evaluate
                      properties of the $\mathrm{t\bar{t}}$ quantum state, such as
                      the purity, von Neumann entropy, and entanglement. All
                      results are consistent with standard model predictions.},
      cin          = {CMS},
      cid          = {I:(DE-H253)CMS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) / DFG
                      project G:(GEPRIS)390833306 - EXC 2121: Das Quantisierte
                      Universum II (390833306) / HIDSS-0002 - DASHH: Data Science
                      in Hamburg - Helmholtz Graduate School for the Structure of
                      Matter $(2019_IVF-HIDSS-0002)$},
      pid          = {G:(DE-HGF)POF4-611 / G:(GEPRIS)390833306 /
                      $G:(DE-HGF)2019_IVF-HIDSS-0002$},
      experiment   = {EXP:(DE-H253)LHC-Exp-CMS-20150101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2512.17557},
      howpublished = {arXiv:2512.17557},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2512.17557;\%\%$},
      doi          = {10.3204/PUBDB-2025-05828},
      url          = {https://bib-pubdb1.desy.de/record/643084},
}