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@ARTICLE{Aad:441313,
      author       = {Aad, Georges and others},
      collaboration = {{CMS Collaboration} and {ATLAS Collaboration}},
      title        = {{C}ombination of the {W} boson polarization measurements in
                      top quark decays using {ATLAS} and {CMS} data at $\sqrt{s}
                      =$ 8 {T}e{V}},
      journal      = {Journal of high energy physics},
      volume       = {08},
      number       = {8},
      issn         = {1029-8479},
      address      = {Trieste},
      publisher    = {SISSA},
      reportid     = {PUBDB-2020-02441, CMS-TOP-19-004. arXiv:2005.03799.
                      ATLAS-TOPQ-2018-02. CERN-EP-2020-012},
      pages        = {051},
      year         = {2020},
      abstract     = {The combination of measurements of the W boson polarization
                      in top quark decays performed by the ATLAS and CMS
                      Collaborations is presented. The measurements are based on
                      proton-proton collision data produced at the LHC at a
                      centre-of-mass energy of 8 TeV, and corresponding to an
                      integrated luminosity of about 20 fb$^{-1}$ for each
                      experiment. The measurements used events containing one
                      lepton and having different jet multiplicities in the final
                      state. The results are quoted as fractions of W bosons with
                      longitudinal ($F_0$), left-handed ($F_\mathrm{L}$), or
                      right-handed ($F_\mathrm{R}$) polarizations. The resulting
                      combined measurements of the polarization fractions are $F_0
                      =$ 0.693 $\pm$ 0.014 and $F_\mathrm{L} =$ 0.315 $\pm$ 0.011.
                      The fraction $F_\mathrm{R}$ is calculated from the unitarity
                      constraint to be $F_\mathrm{R} = -$0.008 $\pm$ 0.007. These
                      results are in agreement with the standard model predictions
                      at next-to-next-to-leading order in perturbative quantum
                      chromodynamics and represent an improvement in precision of
                      25 (29)\% for $F_0$ ($F_\mathrm{L}$) with respect to the
                      most precise single measurement. A limit on anomalous
                      right-handed vector ($V_{\text{R}}$), and left- and
                      right-handed tensor ($g_{\text{L}},g_{\text{R}}$) tWb
                      couplings is set while fixing all others to their standard
                      model values. The allowed regions are [$-$0.11, 0.16] for
                      $V_{\text{R}}$, [$-$0.08, 0.05] for $g_{\text{L}}$, and
                      [$-$0.04, 0.02] for $g_{\text{R}}$, at 95\% confidence
                      level. Limits on the corresponding Wilson coefficients are
                      also derived.},
      keywords     = {p p: colliding beams (INSPIRE) / W: polarization (INSPIRE)
                      / top: decay (INSPIRE) / unitarity: constraint (INSPIRE) /
                      jet: multiplicity (INSPIRE) / p p: scattering (INSPIRE) /
                      perturbation theory: higher-order (INSPIRE) / higher-order:
                      2 (INSPIRE) / W: right-handed (INSPIRE) / ATLAS (INSPIRE) /
                      CMS (INSPIRE) / coupling: vector (INSPIRE) / coupling:
                      tensor (INSPIRE) / coupling: anomaly (INSPIRE) / coupling
                      constant: upper limit (INSPIRE) / quantum chromodynamics:
                      perturbation theory (INSPIRE) / CERN LHC Coll (INSPIRE) /
                      polarization: longitudinal (INSPIRE) / W: left-handed
                      (INSPIRE) / Wilson (INSPIRE) / final state: ((n)jet lepton)
                      (INSPIRE) / experimental results (INSPIRE) / 8000 GeV-cms
                      (INSPIRE)},
      cin          = {ATLAS / CMS},
      ddc          = {530},
      cid          = {I:(DE-H253)ATLAS-20120731 / I:(DE-H253)CMS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF3-611) / DFG
                      project 390833306 - EXC 2121: Quantum Universe (390833306)},
      pid          = {G:(DE-HGF)POF3-611 / G:(GEPRIS)390833306},
      experiment   = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101 /
                      EXP:(DE-H253)LHC-Exp-CMS-20150101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2005.03799},
      howpublished = {arXiv:2005.03799},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2005.03799;\%\%$},
      UT           = {WOS:000562898300001},
      doi          = {10.1007/JHEP08(2020)051},
      url          = {https://bib-pubdb1.desy.de/record/441313},
}