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-- AlexanderFedotov - 24-Nov-2009

Average and Peak ET of probe jet vs iEta

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

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.eps: ProbeJet_ET_vs_iEta_at_etaTag_lt_1.eps

TagJet_ET_vs_ProbeJet_iEta_at_etaTag_lt_1.gif:

TagJet_ET_vs_ProbeJet_iEta_at_etaTag_lt_1.eps: TagJet_ET_vs_ProbeJet_iEta_at_etaTag_lt_1.eps

Attachments

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