-- AlexanderFedotov - 24-Nov-2009

Average and Peak ET
of probe jet vs iEta

It was found in in the Hcal Dijet Logbook page 1 ( Sec.4.2.1 ) from the ET_peak / Pthat_threshold for tag jets in 2009 sample (PThat > 30) that the the uncorrected tag jet energy is underestimated by factor ~2. And the "unbiased" HF correction was found to be 0.50 (Sec.5.5). => It looks like the jet energy scale in HF is roughly correct.

Puprose of this study: try to see here the jet scale recovery for probe jets as going from barrel region to HF, by looking at the evolution of the ET(probe jet) distribution.

Input sample: 2009 PThat>30, 10 TeV Version 1, one root file QCD_Pt30_10TeV.hi_100.root with 70946 evs

Plots made interactively with the script .

The < ET > vs iEta plot:


Original size: gif , eps


Original size: gif , eps

iEta range Peak ET / GeV peak(1-9) /
peak(iEta)
1-9 14.5 1.000
10-16 13.5 1.074
17-19 12.4 1.169
20-25 16.4 0.884
26-29 19.2 0.755
30-35 23.1 0.628
36-40 24.1 0.602

  • ProbeJet_ET_vs_iEta_at_etaTag_lt_1.gif:
    ProbeJet_ET_vs_iEta_at_etaTag_lt_1.gif

  • TagJet_ET_vs_ProbeJet_iEta_at_etaTag_lt_1.gif:
    TagJet_ET_vs_ProbeJet_iEta_at_etaTag_lt_1.gif

Topic attachments
I Attachment History Action Size Date Who Comment
Unknown file formateps ProbeJet.ET_in_iEta_bins.eps r1 manage 52.6 K 2009-11-24 - 21:00 AlexanderFedotov  
GIFgif ProbeJet.ET_in_iEta_bins.gif r1 manage 40.5 K 2009-11-24 - 20:54 AlexanderFedotov  
Unknown file formateps ProbeJet.Mean_ET_vs_iEta.eps r1 manage 19.0 K 2009-11-24 - 20:54 AlexanderFedotov  
GIFgif ProbeJet.Mean_ET_vs_iEta.gif r1 manage 13.3 K 2009-11-24 - 20:53 AlexanderFedotov  
Unknown file formateps ProbeJet_ET_vs_iEta_at_etaTag_lt_1.eps r1 manage 19.3 K 2009-11-25 - 04:34 AlexanderFedotov  
GIFgif ProbeJet_ET_vs_iEta_at_etaTag_lt_1.gif r1 manage 15.4 K 2009-11-25 - 04:34 AlexanderFedotov  
Unknown file formateps TagJet_ET_vs_ProbeJet_iEta_at_etaTag_lt_1.eps r1 manage 18.7 K 2009-11-25 - 04:37 AlexanderFedotov  
GIFgif TagJet_ET_vs_ProbeJet_iEta_at_etaTag_lt_1.gif r1 manage 15.3 K 2009-11-25 - 04:35 AlexanderFedotov  
C source code filec rd_tree2.C r1 manage 6.3 K 2009-11-25 - 04:29 AlexanderFedotov  
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Topic revision: r3 - 2009-11-25 - AlexanderFedotov
 
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