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@ARTICLE{Aaij:454643,
      author       = {Aaij, Roel and others},
      collaboration = {{LHCb Collaboration}},
      title        = {{M}easurement of $f_s / f_u$ {V}ariation with
                      {P}roton-{P}roton {C}ollision {E}nergy and ${B}$-{M}eson
                      {K}inematics},
      journal      = {Physical review letters},
      volume       = {124},
      number       = {12},
      issn         = {1079-7114},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PUBDB-2021-00645, arXiv:1910.09934. CERN-EP-2019-209.
                      LHCb-PAPER-2019-020},
      pages        = {122002},
      year         = {2020},
      note         = {Phys. Rev. Lett. 124, 122002 (2020). All figures and
                      tables, along with any supplementary material and additional
                      information, are available at
                      https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2019-020.html
                      (LHCb public pages)},
      abstract     = {The ratio of the $B_s^0$ and $B^+$ fragmentation fractions
                      $f_s$ and $f_s$ is studied with$B_s^0 → J/ψϕ$ and $B^+
                      → J/ψK^+$ decays using data collected by the LHCb
                      experiment in proton-proton collisions at 7, 8, and 13 TeV
                      center-of-mass energies. The analysis is performed in bins
                      of B-meson momentum, longitudinal momentum, transverse
                      momentum, pseudorapidity, and rapidity. The
                      fragmentation-fraction ratio fs/fu is observed to depend on
                      the B-meson transverse momentum with a significance of
                      6.0σ. This dependency is driven by the 13 TeV sample
                      (8.7σ), while the results for the other collision energies
                      are not significant when considered separately. Furthermore,
                      the results show a 4.8σ evidence for an increase of
                      $f_s/f_u$ as a function of collision energy.},
      keywords     = {p p: scattering (INSPIRE) / p p: colliding beams (INSPIRE)
                      / B+: hadronic decay (INSPIRE) / B/s0: hadronic decay
                      (INSPIRE) / J/psi(3100) (INSPIRE) / Phi(1020) (INSPIRE) / K+
                      (INSPIRE) / transverse momentum dependence (INSPIRE) /
                      rapidity dependence (INSPIRE) / longitudinal momentum:
                      dependence (INSPIRE) / energy dependence (INSPIRE) /
                      fragmentation (INSPIRE) / kinematics (INSPIRE) / LHC-B
                      (INSPIRE) / CERN LHC Coll (INSPIRE) / experimental results
                      (INSPIRE) / 7000 GeV-cms8000 GeV-cms13000 GeV-cms (INSPIRE)
                      / Elementary Particles and Fields (autogen)},
      cin          = {IT},
      ddc          = {530},
      cid          = {I:(DE-H253)IT-20120731},
      pnm          = {6G1 - TIER II (POF3-6G1)},
      pid          = {G:(DE-HGF)POF3-6G1},
      experiment   = {EXP:(DE-H253)TIER-II-20150101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {1910.09934},
      howpublished = {arXiv:1910.09934},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:1910.09934;\%\%$},
      pubmed       = {pmid:32281875},
      UT           = {WOS:000522195100005},
      doi          = {10.1103/PhysRevLett.124.122002},
      url          = {https://bib-pubdb1.desy.de/record/454643},
}