Difference: JetFlavourTagging (9 vs. 10)

Revision 102013-07-09 - DanProtopopescu

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Jet Flavour Tagging Howto

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This is a detailed record on how the Marlin framework and included LCFI packages are used for jet flavour tagging. b-jet flavour tagging is part of our analysis of the feasibility of the ZZ fusion channel with CLIC ILD at 1.4 TeV.

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Jet Finder and Truth Tagging

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Purity and Efficiency Studies

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< To determine the optimal cut for our b-tagging, a purity vs. efficiency study was performed. One can use the MakePurityVsEfficiencyRootPlot.C macro provided by the LCFIVertex package.

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> To determine the optimal cut for our b-tagging, a purity vs. efficiency study needs to be done. We use the MakePurityVsEfficiencyRootPlot.C macro provided by the LCFIVertex package.

First, we have to run:

  <processor name="MyAIDAProcessor"/>

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<parameter name="TrueJetFlavourCollection" type="string">TrueJetFlavour_4Jets </parameter>

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< Note that LCFI must be compiled with ROOT if one wants .root output from PlotProcessor (instead of .txt). For this, add as usual

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> Note that LCFI must be compiled with ROOT if one wants .root output from PlotProcessor (instead of .txt). For this, we added

FIND_PACKAGE( ROOT REQUIRED )
FOREACH( pkg ROOT )

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ENDIF() ENDFOREACH()

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< to the LCFIVertex/CMakeLists.txt file, source the root environment, then run cmake and make install.

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> to the LCFIVertex/CMakeLists.txt file, sourced the root environment, then ran cmake and make install.

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< Once the Plots processors are run via Marlin, a RAIDA root file will be produced. Customise the MakePurityVsEfficiencyRootPlot.C macro and run it to use the RAIDA as input to produce the purity vs. efficiency plots.

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> Once the AIDA Plots processors are run via Marlin, a RAIDA root file is produced. We customised the MakePurityVsEfficiencyRootPlot.C macro and ran it to use this RAIDA file as input to produce the purity vs. efficiency plots.

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