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@ARTICLE{Aad:205159,
      author       = {Aad, Georges and others},
      collaboration = {{ATLAS Collaboration}},
      title        = {{M}easurement of spin correlation in top-{A}ntitop quark
                      events and search for top squark pair production in pp
                      collisions at $\sqrt{s}=8$ {T}e{V} using the {ATLAS}
                      detector},
      reportid     = {PUBDB-2014-04586, CERN-PH-EP-2014-257. arXiv:1412.4742},
      year         = {2014},
      note         = {OA},
      abstract     = {A measurement of spin correlation in $t\bar{t}$ production
                      is presented using data collected with the ATLAS detector at
                      the Large Hadron Collider in proton-proton collisions at a
                      center-of-mass energy of 8 TeV, corresponding to an
                      integrated luminosity of 20.3 fb$^{-1}$. The correlation
                      between the top and antitop quark spins is extracted from
                      dilepton $t\bar{t}$ events by using the difference in
                      azimuthal angle between the two charged leptons in the
                      laboratory frame. In the helicity basis the measured degree
                      of correlation corresponds to $A_{helicity} = 0.38 \pm
                      0.04$, in agreement with the Standard Model prediction. A
                      search is performed for pair production of top squarks with
                      masses close to the top quark mass decaying to predominantly
                      right-handed top quarks and a light neutralino, the lightest
                      supersymmetric particle. Top squarks with masses between the
                      top quark mass and 191 GeV are excluded at the 95\%
                      confidence level.},
      keywords     = {p p: colliding beams (INSPIRE) / top: pair production
                      (INSPIRE) / top: mass (INSPIRE) / spin: correlation
                      (INSPIRE) / top: right-handed (INSPIRE) / squark: pair
                      production (INSPIRE) / stop: mass: lower limit (INSPIRE) /
                      top: spin (INSPIRE) / p p: scattering (INSPIRE) / top:
                      helicity (INSPIRE) / ATLAS (INSPIRE) / CERN LHC Coll
                      (INSPIRE) / final state: ((n)jet dilepton) (INSPIRE) /
                      experimental results (INSPIRE) / 8000 GeV-cms (INSPIRE)},
      cin          = {ATLAS},
      cid          = {I:(DE-H253)ATLAS-20120731},
      pnm          = {Experiments at LHC (ATLAS) (POF2-512)},
      pid          = {G:(DE-H253)POF2-LHC-Exp.-(ATLAS)-20130405},
      experiment   = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
      typ          = {PUB:(DE-HGF)25 / PUB:(DE-HGF)15},
      eprint       = {1412.4742},
      howpublished = {arXiv:1412.4742},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:1412.4742;\%\%$},
      url          = {https://bib-pubdb1.desy.de/record/205159},
}