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@ARTICLE{Aad:613061,
      author       = {Aad, Georges and others},
      collaboration = {{ATLAS Collaboration}},
      title        = {{S}tudies of the energy dependence of diboson polarization
                      fractions and the {R}adiation {A}mplitude {Z}ero effect in
                      {WZ} production with the {ATLAS} detector},
      reportid     = {PUBDB-2024-05530, arXiv:2402.16365. CERN-EP-2024-045},
      year         = {2024},
      note         = {Comment: 32 pages in total, author list starting page 15, 3
                      figures, 2 tables, submitted to Phys. Rev. Lett. All figures
                      including auxiliary figures are available at
                      https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2020-01/},
      abstract     = {This Letter presents the first study of the
                      energy-dependence of diboson polarization fractions in $WZ
                      \rightarrow \ell\nu \ell'\ell'~(\ell, \ell'=e, \mu)$
                      production. The data set used corresponds to an integrated
                      luminosity of 140 fb$^{-1}$ of proton-proton collisions at a
                      center-of-mass energy of 13 TeV recorded by the ATLAS
                      detector. Two fiducial regions with an enhanced presence of
                      events featuring two longitudinally-polarized bosons are
                      defined. A non-zero fraction of events with two
                      longitudinally-polarized bosons is measured with an observed
                      significance of 5.3 standard deviations in the region with
                      $100<p_T^Z\leq200$ GeV and 1.6 standard deviations in the
                      region with p$_T$$^Z$>200 GeV, where $p_T^Z$ is the
                      transverse momentum of the $Z$ boson. This Letter also
                      reports the first study of the Radiation Amplitude Zero
                      effect. Events with two transversely-polarized bosons are
                      analyzed for the $\Delta Y(\ell_W Z)$ and $\Delta Y(WZ)$
                      distributions defined respectively as the rapidity
                      difference between the lepton from the $W$ boson decay and
                      the $Z$ boson and the rapidity difference between the $W$
                      boson and the $Z$ boson. Significant suppression of events
                      near zero is observed in both distributions. Unfolded
                      $\Delta Y(\ell_W Z)$ and $\Delta Y(WZ)$ distributions are
                      also measured and compared to theoretical predictions.},
      keywords     = {rapidity, difference (INSPIRE) / p p, scattering (INSPIRE)
                      / boson, decay (INSPIRE) / polarization (INSPIRE) / GeV
                      (INSPIRE) / ATLAS (INSPIRE) / energy dependence (INSPIRE) /
                      transverse momentum (INSPIRE) / lepton (INSPIRE) /
                      suppression (INSPIRE) / TeV (INSPIRE)},
      cin          = {ATLAS},
      cid          = {I:(DE-H253)ATLAS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611)},
      pid          = {G:(DE-HGF)POF4-611},
      experiment   = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2402.16365},
      howpublished = {arXiv:2402.16365},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2402.16365;\%\%$},
      doi          = {10.3204/PUBDB-2024-05530},
      url          = {https://bib-pubdb1.desy.de/record/613061},
}