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ATLAS analysis One Lepton Mode SUSY. 2007.7.13 Ginga Akimoto. Background estimation (1fb-1). SU1-SU4 tt->bblnln tt->bblnqq W Leading Jet pt mEt nJet(Pt>50GeV) Lep Pt Control Sample (Mt <100GeV) renormalize by Event # of mEt=100GeV-200GeV. Mt. # Na(Mt<100Gev ) and Nb(Mt=100-400).

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background estimation 1fb 1
Background estimation (1fb-1)
  • SU1-SU4
  • tt->bblnln
  • tt->bblnqq
  • W
  • Leading Jet pt
  • mEt
  • nJet(Pt>50GeV)
  • Lep Pt
  • Control Sample (Mt <100GeV)
  • renormalize by Event # of mEt=100GeV-200GeV
na mt 100gev and nb mt 100 400
# Na(Mt<100Gev ) and Nb(Mt=100-400)
  • Na(ctrl) Nb(100-) N_over
  • ttlnln 194.876 197.372
  • ttlnqq 1773.54 63.2566
  • W 786.222 29.0538
  • SU1 172.065 236.283 19.1486
  • SU2 22.518 30.9096 2.50596
  • SU3 325.83 407.035 36.2607
  • SU4 3819.93 3238.3 425.109
  • N_over=Na(SUSY)/Na(ttlnqq)*Nb(ttlnln)
  • Nb(SUSY) >> N_over ~10%
mt 200gev
Mt > 200GeV
  • low mEt missing @ high Mt

Mt

mEt

systematic error met
systematic error (mEt)
  • mEt ------>
  • mEt*1.1