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HepMC filter is a simple application that reads a file in HepMC format and selects the events that satisfy certain criteria. The idea is to reduce the number of events we need to process after the selection.
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Getting and Compiling the HepMC filter
- tau1.hep.utexas.edu:
NOTE: To download the source file you need to have an access to ATLAS Subversion system.
1. Set up SVNROOT global variable that points to the ATLAS user's repository
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export SVNROOT=svn+ssh://<username>@svn.cern.ch/reps/atlasusr |
where <username> is your username on ATLAS.
2. Check-out the package from SVN
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svn co $SVNROOT/yuraic/ttH/Projects/HepMC_Filter/trunk HepMC_Filter |
This will create HepMC_Filter directory and check-out a package in it. If you want to check-out a version with certain tag, use the following command
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svn co $SVNROOT/yuraic/ttH/Projects/HepMC_Filter/tags/HepMC_Filter-00-00-03 HepMC_Filter |
This will check-out version HepMC_Filter-00-00-03 of the HepMC filter.
3. Source the setup.file
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cd HepMC_Filter
source setup.sh |
4. Compile the filter
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gmake
gmake clean |
At this stage you must have 'HepMC_Filter.exe' in the 'HepMC_Filter/bin' directory. This is the actual filter application.
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- Not at the tau1 machine
1. You will need to download, compile and install the HepMC package. You can get more information here - https://savannah.cern.ch/projects/hepmc/
2. The global variable 'HepMC_PATH' from 'setup.sh' needs to be pointing to the directory where HepMC is installed.
3. The remaining steps are similar to the case with the tau1 machine.
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Running the filter
In the 'share' subdirectory you will find 'dilepton_filter.sh'. You need to modify this file to star processing the data.
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This sections lists different versions of the filter and the criteria applied in them. I am listing here few tags just as an example. You can get the information about each tag using either svn log command or from the web-based interface to SVN - https://svnweb.cern.ch/trac/atlasusr/browser/yuraic/ttH/Projects/HepMC_Filter/tags
Tag | Description |
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HepMC_Filter-00-00-01 | HepMC Dilpton filter (exactly two leptons in final state; electrons, muons and taus are allowed) |
HepMC_Filter-00-00-02 | Two leptons inclusive; Lepton pt > 5 GeV |
HepMC_Filter-00-00-03 | Two leptons inclusive; Lepton pt > 10 GeV |