Boosted Ttbar Resonance Search Update Ken Johns, Venkat Kaushik, Finn O’Grady, Sam Silva, Jason Veatch (U. Arizona)

Status  Continued work on cut flows Updated expected ttbar and W+jets events with different b-tagging algorithms Posted/will post numbers Sarah requested with ele SF, muo SF, LAr hole separately for full ttbar sample  Do boosted ttbar D3PD’s have 10x less statistics than resolved? Would still like to do expected background comparison (shown last week) with some groups QCD estimate in e+jets done 2

B-tag Study  Expected number of events for 1fb-1 3 elettbarW+jetsmuottbarW+jets Pretag SV0> Cnn> Cnn> Cnn>

Status  Systematics for limit setting D4PD’s produced for  JES  Lepton trigger, ID, reco, p/E scale, p/E resolution  ISR/FSR  Parton shower/fragmentation Still to make  JER, BJES  b-tagging  MC generator  Pileup 4

ttbar Reconstruction (Zp)  Shown before but beginning to collect plots for the note 5

ttbar Reconstruction (Zp) 6

ttbar Reconstruction (KKg) 7

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Upcoming Week  QCD estimate for muons  Limit setting for statistical only and partial systematics Need remaining Zp and KKg D3PD’s to be produced (if not existing) 9

Observed versus Expected (1.04 fb-1)  No b-tag with all SF, etc. 10 elemuo Ttbar Single top W+jets Z+jets Diboson QCD?? Total Data414387

Observed versus Expected (1.04 fb-1)  b-tag (SV0) with all SF, etc. 11 elemuo Ttbar Single top W+jets Z+jets Diboson QCD?? Total Data207198