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TTbar  τ + jets : update on ABCD QCD estimation

TTbar  τ + jets : update on ABCD QCD estimation. William Edson SUNY at Albany Anirvan Sircar Louisiana Tech University. Definitions. All taus in events are truth matched. Truth matched taus in the signal sample are counted as true taus .

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TTbar  τ + jets : update on ABCD QCD estimation

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  1. TTbarτ + jets:update on ABCD QCD estimation William Edson SUNY at Albany AnirvanSircar Louisiana Tech University

  2. Definitions • All taus in events are truth matched. • Truth matched taus in the signal sample are counted as true taus. • Unmatched taus and all taus from other samples are considered fakes since they do not correspond to our signal. • For cut 12, only count the taus selected from the event for continued analysis (highest BDT satisfying cut 12). • Sig Efficiency: • Rejection Factor:

  3. Cutflow • C0: GRL • C1: Trigger • C2: Primary vertex with ntracks > 4 • C3: Electron/muon overlap, larVeto • C4: Jet cleaning • C5: Lepton Veto • C6: njets >= 4 with eta < 2.3 and |jvf| > 0.75 • C7: ptmiss significance > 8 • C8: MT < 70GeV • C9: Sum ET < 500GeV • C10: >= 1 bjet • C11: at least one tau passing TauID • C12: at least one trigger matched tau with pT > 40GeV • C13: MC tau object match

  4. BDT Score > 0.7

  5. BDTSigTight

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