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

2. 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

3. B-tag Study  Expected number of events for 1fb-1 3 elettbarW+jetsmuottbarW+jets Pretag235.3893.81316.09146.92 SV0>5.85190.919.78243.5313.18 Cnn>2.0198.199.83268.3710.51 Cnn>0.35210.5417.11286.8220.04 Cnn>-1.2522633.21303.146.18

4. 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

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

6. ttbar Reconstruction (Zp) 6

7. ttbar Reconstruction (KKg) 7

8. 8

9. 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

10. Observed versus Expected (1.04 fb-1)  No b-tag with all SF, etc. 10 elemuo Ttbar235.38316.09 Single top9.2914.55 W+jets93.81146.92 Z+jets19.9520.38 Diboson1.732.46 QCD?? Total360.17500.39 Data414387

11. Observed versus Expected (1.04 fb-1)  b-tag (SV0) with all SF, etc. 11 elemuo Ttbar190.91243.53 Single top6.0410.01 W+jets9.7813.18 Z+jets1.451.57 Diboson0.330.16 QCD?? Total208.51268.45 Data207198