How to make Plots of b Tag Performance in CMSSW 1.6

The package RecoBTag/Analysis contains software to make standard b tag performance plots, such as those published in the Physics TDR. (It makes use internally of either the CMS.PhysicsTools/JetMCAlgos or RecoBTag/MCTools packages, just described). This section gives a simple example of how to run it. For details, such as how to configure it and directly produce .pdf plots etc., see the the more detailed description here in the CMSSW Offline Guide.

  1. Create a CMSSW 1.6.7 (or later) project area and go to its src/ directory.
  2. cvs co -r CMSSW_yourVersion RecoBTag/Analysis/ (If you are using 1.6.7, please check out instead V00-03-08)
  3. scram b
  4. cd RecoBTag/Analysis/test/
  5. cmsRun bTagAnalysisExample.cfg

This produces two ROOT files: bTagTrackProbabilityAnalysis.root for the probability tag and bTagSoftLeptonAnalysis.root for the soft lepton tag. If you browse the first of these with TBrowser in ROOT, you will find many histograms, such as:

Light quark vs. b tag efficiency: JetTag_jetProbabilityJetTags_GLOBAL/FlavEffVsBeff_DUS_discrFC_jetProbabilityTags_GLOBAL. (This folder contains information obtained from the JetTag object).

160_b_vs_uds_effi.png

3D impact parameter significance of 2nd most significant track: TrackIP_jetProbabilityJetTags_GLOBAL/ips2_3D_jetProbabilityJetTags_GLOBALB. (This folder contains information obtained from the TagInfo object).

160_ips2_3D_b.png

-- IanTomalin - 30 Oct 2007

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PNGpng 160_b_vs_uds_effi.png r1 manage 22.7 K 2007-10-30 - 15:47 IanTomalin  
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Topic revision: r4 - 2008-02-27 - AreshVedaee


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