TTBAR Τ + JETS:UPDATE ON ABCD QCD

ESTIMATIONWilliam Edson

SUNY at AlbanyAnirvan Sircar

Louisiana Tech University

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:

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

BDT Score > 0.7Signal Fake Sig Eff Reject Signal/

Background

C5 35049 123693 1 0.283 0.283

C6 17327 46832 0.494 0.748 0.370

C7 14798 35555 0.422 0.986 0.416

C8 9616 13562 0.274 2.58 0.709

C9 4673 8052 0.133 4.35 0.580

C10 4068 5959 0.116 5.88 0.683

C11 2965 1601 0.0846 21.9 1.85

C12 1536 621 0.0438 56.4 2.47

BDTSigTight

Signal Fake Sig Eff Reject Signal/ Backgrou

nd

C11 1624 766 0.0463 45.8 2.12

C12 731 272 0.0208 129 2.69