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@ARTICLE{Aad:220738,
      author       = {Aad, Georges and others},
      collaboration = {{ATLAS Collaboration}},
      title        = {{M}easurement of {S}pin {C}orrelation in {T}op-{A}ntitop
                      {Q}uark {E}vents and {S}earch for {T}op {S}quark {P}air
                      {P}roduction in pp {C}ollisions at $\sqrt {s} = 8 $
                       {T}e{V} {U}sing the {ATLAS} {D}etector},
      journal      = {Physical review letters},
      volume       = {114},
      number       = {14},
      issn         = {1079-7114},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PUBDB-2015-02381, CERN-PH-EP-2014-257},
      pages        = {142001},
      year         = {2015},
      note         = {OA},
      abstract     = {A measurement of spin correlation in tt¯ 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
                      tt¯ events by using the difference in the azimuthal angle
                      between the two charged leptons in the laboratory frame. In
                      the helicity basis the measured degree of correlation
                      corresponds to Ahelicity=0.38±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},
      ddc          = {550},
      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)29 / PUB:(DE-HGF)16},
      eprint       = {1412.4742},
      howpublished = {arXiv:1412.4742},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:1412.4742;\%\%$},
      UT           = {WOS:000352350000006},
      pubmed       = {pmid:25910111},
      doi          = {10.1103/PhysRevLett.114.142001},
      url          = {https://bib-pubdb1.desy.de/record/220738},
}