Pileup Jet Identification

PAS : JME-13-005

Abstract

High pileup in LHC collisions can increase incidence of jets by several large factors. To reduce the incidence of jets from pileup and to preserve the rate of good jets, a jet identification based on both vertex information and jet shape information has been developed.The construction of this jet identifier is described and the performances are evaluated using both Z+jets MC simulated samples and Z+jets data collected in the 2012 $\sqrt{s}=8$~TeV run. The effectiveness of this jet identifier is discussed in the context of jet vetoes and vector boson fusion production.|

Plots from the paper JME-13-005 ( click on plot to get .pdf )

Toy MC Plots

Rate of pileup jets computed by considering the probability overlapping pileup jets of lower pT, which sum up to a larger single jet of sum pT given by the individual components. The individual jet probabilities are determined by the jet cone size compared to the CMS jet volume using a predicted inclusive jet spectrum per collisions of 1/pT^5.

JME-13-005 Plots

Rate of data and MC PU jets with pt>25GeV relative to the expected rate of real jets as a function of the number of reconstructed primary vertices.
Jet pT distribution for all jets having a pT > 25GeV for the full 2012 dataset.
Jet eta distribution for all jets having a pT > 25 GeV for the full 2012 dataset.
Comparison between jet flavors and pileup for jets with pT > 25GeV for the track related variable: beta
Comparison between jet flavors and pileup for jets with pT > 25GeV for the track related variable: betaStar
Comparison between jet flavors and pileup for jets with pT > 25GeV for the track related variable: dZ
Comparison between jet flavors and pileup for jets with pT > 25GeV for the track related variable: number of primary vertices
$\langle\Delta R^2 \rangle$ for PF jets with pT > 25GeV and eta < 2.5
$\langle\Delta R^2 \rangle$ for PF jets with pT > 25GeV and eta > 3.0
A < (\Delta R) < A+0.1 for PF jets with pT > 25GeV and eta < 2.5 for A=0.1
A < (\Delta R) < A+0.1 for PF jets with pT > 25GeV and eta < 2.5 for A=0.2
A < (\Delta R) < A+0.1 for PF jets with pT > 25GeV and eta < 2.5 for A=0.3
A < (\Delta R) < A+0.1 for PF jets with pT > 25GeV and eta < 2.5 for A=0.4
A < (\Delta R) < A+0.1 for PF jets with pT > 25GeV and eta < 2.5 for A=0.5
Number of charged particles for PF jets with pT > 25GeV and eta < 2.5
Number of neutral particles for PF jets with pT > 25GeV andeta < 2.5.
$p_{T}^{D}$ for PF jets with pT > 25GeV and eta < 2.5.
MVA discriminator for particle flow jets with p_{T} > 25GeV and eta < 2.5.
MVA discriminator for particle flow jets with p_{T} > 25GeV and 2.5 < eta < 2.75. Disagreement in the pileup region of the MVA is present in the region where 2.5<eta. This is a known effect, which results from improper simulation of out-of-time pileup.
MVA discriminator for particle flow jets with p_{T} > 25GeV and 2.75 < eta < 3.0. Disagreement in the pileup region of the MVA is present in the region where 2.5<eta. This is a known effect, which results from improper simulation of out-of-time pileup.
MVA discriminator for particle flow jets with p_{T} > 25~\GeV and 3.0 < eta < 5.0. Disagreement in the pileup region of the MVA is present in the region where 2.5<eta. This is a known effect, which results from improper simulation of out-of-time pileup.
ROC curves for quark and gluon jets with 25 < pT < 100gev for eta < 2.5
ROC curves for quark and gluon jets with 25 < pT< 100gev for 2.5 < eta < 2.75
ROC curves for quark and gluon jets with 25 < pT < 100 gev for 2.75 < eta < 3.0
ROC curves for quark and gluon jets with 25 < pT < 100 gev for 3.0 < eta < 5.0
Data-MC comparison of the MVA (loose working point) pileup jet identification efficiency versus eta on the Z to mu mu+Jets sample for PF jets with pT > 25GeV
Data-MC comparison of the MVA (loose working point) pileup jet identification efficiency versus the number of primary vertices on the Z to mumu +jets sample for PF jets with pT > 25~GeV
Data-MC comparison of the MVA (loose working point) pileup jet identification efficiency versus jet pt on the Z(to mumu )+jets sample for PF jets with pT > 25GeV

Usage Examples

Rate of migration of 0 jets to 1 jet events for a jet with pT above the threshold given by the axis for Z to dimuon events before the pileup jet is applied.
Rate of migration of 0 jets to 1 jet events for a jet with pT above the threshold given by the axis for Z to dimuon events after the pileup jet is applied.
Rate of all jets to real jets before and after the pileup jet id is applied for jets with a pT cut greater 25 GeV and eta < 2.5
Rate of all jets to real jets before and after the pileup jet id is applied for jets with a pT cut greater 25 GeV and eta > 2.5
Rate of all jets to real jets before and after the pileup jet id is applied d for jets passing a generic VBF selection having two jets with a pT cut greater than 30 GeV , the mass of the dijet system is greater than 500 GeV and the difference in eta between the two jets is > 3.5

Topic attachments
I Attachment History Action Size Date Who Comment
PDFpdf 1centraljet25100full53xDiscriminant_roc.pdf r1 manage 16.4 K 2013-08-10 - 11:37 PhilipHarris  
PNGpng 1centraljet25100full53xDiscriminant_roc.png r1 manage 33.0 K 2013-08-10 - 11:22 PhilipHarris  
PDFpdf 1endcap1jet25100full53xDiscriminant_roc.pdf r1 manage 64.5 K 2013-08-10 - 11:37 PhilipHarris  
PNGpng 1endcap1jet25100full53xDiscriminant_roc.png r1 manage 32.2 K 2013-08-10 - 11:22 PhilipHarris  
PDFpdf 1endcap2jet25100full53xDiscriminant_roc.pdf r1 manage 15.6 K 2013-08-10 - 11:37 PhilipHarris  
PNGpng 1endcap2jet25100full53xDiscriminant_roc.png r1 manage 32.8 K 2013-08-10 - 11:23 PhilipHarris  
PDFpdf 1forwardjet25100full53xDiscriminant_roc.pdf r1 manage 15.2 K 2013-08-10 - 11:37 PhilipHarris  
PNGpng 1forwardjet25100full53xDiscriminant_roc.png r1 manage 31.8 K 2013-08-10 - 11:24 PhilipHarris  
GIFgif 2wimr.gif r1 manage 23.5 K 2013-08-10 - 02:15 PhilipHarris  
PDFpdf ALLjetEtaCan.pdf r2 r1 manage 18.4 K 2013-08-15 - 20:33 PhilipHarris  
PNGpng ALLjetEtaCan.png r2 r1 manage 22.9 K 2013-08-15 - 20:33 PhilipHarris  
PDFpdf HEInmvaCan.pdf r3 r2 r1 manage 20.8 K 2013-08-15 - 20:33 PhilipHarris  
PNGpng HEInmvaCan.png r4 r3 r2 r1 manage 25.7 K 2013-08-15 - 20:33 PhilipHarris  
PDFpdf HEOutmva.pdf r1 manage 20.7 K 2013-08-12 - 21:17 PhilipHarris  
PNGpng HEOutmva.png r2 r1 manage 26.1 K 2013-08-12 - 21:17 PhilipHarris  
PDFpdf HEOutmvaCan.pdf r2 r1 manage 21.8 K 2013-08-15 - 20:33 PhilipHarris  
PNGpng HEOutmvaCan.png r4 r3 r2 r1 manage 30.2 K 2013-08-15 - 20:33 PhilipHarris  
PDFpdf HERate.pdf r1 manage 18.5 K 2013-08-10 - 14:06 PhilipHarris  
PNGpng HERate.png r1 manage 25.9 K 2013-08-10 - 14:06 PhilipHarris  
PNGpng HERate25NPV.png r1 manage 25.4 K 2013-08-12 - 21:06 PhilipHarris  
PDFpdf HFdR2MeanCan.pdf r3 r2 r1 manage 16.2 K 2013-08-23 - 12:43 PhilipHarris  
PNGpng HFdR2MeanCan.png r4 r3 r2 r1 manage 20.5 K 2013-08-23 - 12:43 PhilipHarris  
PDFpdf HFmvaCan.pdf r2 r1 manage 19.6 K 2013-08-15 - 20:32 PhilipHarris  
PNGpng HFmvaCan.png r4 r3 r2 r1 manage 26.6 K 2013-08-15 - 20:32 PhilipHarris  
PDFpdf JME-13-005-pas.pdf r1 manage 663.3 K 2013-08-23 - 12:47 PhilipHarris  
PDFpdf JME-13-005_temp.pdf r3 r2 r1 manage 662.7 K 2013-08-16 - 19:03 PhilipHarris  
GIFgif PileupRate.gif r2 r1 manage 52.6 K 2013-08-16 - 18:13 PhilipHarris  
PDFpdf TKRate.pdf r1 manage 18.0 K 2013-08-10 - 14:06 PhilipHarris  
PNGpng TKRate.png r1 manage 23.6 K 2013-08-10 - 14:06 PhilipHarris  
PDFpdf TKRate25NPV.pdf r1 manage 18.1 K 2013-08-12 - 21:14 PhilipHarris  
PNGpng TKRate25NPV.png r1 manage 23.9 K 2013-08-12 - 21:14 PhilipHarris  
PDFpdf TKRate25NPV_v2.pdf r1 manage 18.1 K 2013-08-12 - 21:06 PhilipHarris  
PNGpng TKRateNPV_v2.png r1 manage 23.9 K 2013-08-12 - 21:06 PhilipHarris  
PDFpdf TKbetaCan.pdf r4 r3 r2 r1 manage 17.5 K 2013-08-23 - 12:43 PhilipHarris  
PNGpng TKbetaCan.png r5 r4 r3 r2 r1 manage 19.8 K 2013-08-23 - 12:44 PhilipHarris  
PDFpdf TKbetaStarCan.pdf r5 r4 r3 r2 r1 manage 17.7 K 2013-08-23 - 12:43 PhilipHarris  
PNGpng TKbetaStarCan.png r6 r5 r4 r3 r2 manage 23.2 K 2013-08-23 - 12:43 PhilipHarris  
PDFpdf TKd0Can.pdf r1 manage 14.9 K 2013-08-12 - 21:30 PhilipHarris  
PNGpng TKd0Can.png r1 manage 18.0 K 2013-08-12 - 21:28 PhilipHarris  
PDFpdf TKdR2MeanCan.pdf r4 r3 r2 r1 manage 16.2 K 2013-08-23 - 12:43 PhilipHarris  
PNGpng TKdR2MeanCan.png r4 r3 r2 r1 manage 20.2 K 2013-08-15 - 20:32 PhilipHarris  
PDFpdf TKdZCan.pdf r7 r6 r5 r4 r3 manage 16.2 K 2013-08-23 - 12:44 PhilipHarris  
PNGpng TKdZCan.png r9 r8 r7 r6 r5 manage 19.4 K 2013-08-23 - 12:44 PhilipHarris  
PDFpdf TKfrac01Can.pdf r4 r3 r2 r1 manage 17.6 K 2013-08-23 - 12:41 PhilipHarris  
PNGpng TKfrac01Can.png r6 r5 r4 r3 r2 manage 21.4 K 2013-08-23 - 12:41 PhilipHarris  
PDFpdf TKfrac02Can.pdf r4 r3 r2 r1 manage 17.3 K 2013-08-23 - 12:41 PhilipHarris  
PNGpng TKfrac02Can.png r6 r5 r4 r3 r2 manage 22.2 K 2013-08-23 - 12:41 PhilipHarris  
PDFpdf TKfrac03Can.pdf r4 r3 r2 r1 manage 17.2 K 2013-08-23 - 12:41 PhilipHarris  
PNGpng TKfrac03Can.png r6 r5 r4 r3 r2 manage 22.8 K 2013-08-23 - 12:41 PhilipHarris  
PDFpdf TKfrac04Can.pdf r4 r3 r2 r1 manage 16.6 K 2013-08-23 - 12:43 PhilipHarris  
PNGpng TKfrac04Can.png r6 r5 r4 r3 r2 manage 20.8 K 2013-08-23 - 12:43 PhilipHarris  
PDFpdf TKfrac05Can.pdf r4 r3 r2 r1 manage 15.9 K 2013-08-23 - 12:43 PhilipHarris  
PNGpng TKfrac05Can.png r7 r6 r5 r4 r3 manage 20.5 K 2013-08-23 - 12:43 PhilipHarris  
PDFpdf TKjetPtCan.pdf r6 r5 r4 r3 r2 manage 18.1 K 2013-08-23 - 12:41 PhilipHarris  
PNGpng TKjetPtCan.png r8 r7 r6 r5 r4 manage 19.7 K 2013-08-23 - 12:41 PhilipHarris  
PDFpdf TKmvaCan.pdf r2 r1 manage 20.5 K 2013-08-15 - 20:30 PhilipHarris  
PNGpng TKmvaCan.png r4 r3 r2 r1 manage 24.3 K 2013-08-15 - 20:30 PhilipHarris  
PDFpdf TKnChargedCan.pdf r4 r3 r2 r1 manage 18.3 K 2013-08-23 - 12:44 PhilipHarris  
PNGpng TKnChargedCan.png r5 r4 r3 r2 r1 manage 21.9 K 2013-08-23 - 12:44 PhilipHarris  
PDFpdf TKnNeutralsCan.pdf r4 r3 r2 r1 manage 18.1 K 2013-08-23 - 12:44 PhilipHarris  
PNGpng TKnNeutralsCan.png r5 r4 r3 r2 r1 manage 21.7 K 2013-08-23 - 12:44 PhilipHarris  
PDFpdf TKnvtxCan.pdf r4 r3 r2 r1 manage 16.2 K 2013-08-15 - 19:55 PhilipHarris  
PNGpng TKnvtxCan.png r6 r5 r4 r3 r2 manage 20.9 K 2013-08-15 - 19:55 PhilipHarris  
PDFpdf TKptDCan.pdf r4 r3 r2 r1 manage 17.0 K 2013-08-23 - 12:46 PhilipHarris  
PNGpng TKptDCan.png r5 r4 r3 r2 r1 manage 20.3 K 2013-08-23 - 12:46 PhilipHarris  
PDFpdf VBFRate.pdf r1 manage 15.5 K 2013-08-10 - 14:06 PhilipHarris  
PNGpng VBFRate.png r1 manage 21.1 K 2013-08-10 - 14:06 PhilipHarris  
PDFpdf cEff_vs_JetEta_fullId_Loose.pdf r1 manage 27.7 K 2013-08-10 - 12:54 PhilipHarris  
PNGpng cEff_vs_JetEta_fullId_Loose.png r3 r2 r1 manage 39.6 K 2013-08-13 - 00:07 PhilipHarris  
PDFpdf cEff_vs_JetPt_fullId_Loose.pdf r1 manage 23.1 K 2013-08-10 - 11:37 PhilipHarris  
PNGpng cEff_vs_JetPt_fullId_Loose.png r2 r1 manage 33.5 K 2013-08-13 - 00:05 PhilipHarris  
PDFpdf cEff_vs_NumberOfVertices_fullId_Loose.pdf r1 manage 22.9 K 2013-08-10 - 11:37 PhilipHarris  
PNGpng cEff_vs_NumberOfVertices_fullId_Loose.png r2 r1 manage 33.2 K 2013-08-13 - 00:05 PhilipHarris  
PDFpdf jetEta25.pdf r4 r3 r2 r1 manage 18.4 K 2013-08-15 - 21:14 PhilipHarris  
PNGpng jetEta25.png r4 r3 r2 r1 manage 23.3 K 2013-08-15 - 21:14 PhilipHarris  
PDFpdf jetRate25NPV.pdf r2 r1 manage 15.2 K 2013-08-12 - 23:43 PhilipHarris  
PNGpng jetRate25NPV.png r2 r1 manage 20.6 K 2013-08-12 - 23:43 PhilipHarris  
PDFpdf jetveto_0jet_vtxcomp_wrt_loPU.pdf r1 manage 22.0 K 2013-08-11 - 01:44 PhilipHarris  
PNGpng jetveto_0jet_vtxcomp_wrt_loPU.png r1 manage 36.3 K 2013-08-11 - 01:44 PhilipHarris  
PDFpdf jetveto_0jet_vtxcomp_wrt_loPU_noJetID.pdf r1 manage 21.9 K 2013-08-10 - 12:54 PhilipHarris  
PNGpng jetveto_0jet_vtxcomp_wrt_loPU_noJetID.png r1 manage 40.6 K 2013-08-10 - 12:54 PhilipHarris  
Edit | Attach | Watch | Print version | History: r15 < r14 < r13 < r12 < r11 | Backlinks | Raw View | WYSIWYG | More topic actions
Topic revision: r15 - 2013-08-23 - PhilipHarris
 
    • Cern Search Icon Cern Search
    • TWiki Search Icon TWiki Search
    • Google Search Icon Google Search

    CMSPublic All webs login

This site is powered by the TWiki collaboration platform Powered by PerlCopyright & 2008-2022 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
or Ideas, requests, problems regarding TWiki? use Discourse or Send feedback