Generator level heavy flavour jet origin/flavour identification #4934
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…igin/flavour identification
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A new Pull Request was created by @bartosik-desy (Nazar Bartosik) for CMSSW_7_2_X. Generator level heavy flavour jet origin/flavour identification It involves the following packages: PhysicsTools/JetMCAlgos @nclopezo, @vadler, @cmsbuild, @Degano, @monttj can you please review it and eventually sign? Thanks. |
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It's also should be kept in mind that the current default genJets input collection as it is set in PhysicsTools/JetMCAlgos/python/GenHFHadronMatcher_cfi.py is set to cms.InputTag('ak5GenJets','','SIM') And then in PhysicsTools/JetMCAlgos/python/sequences/GenHFHadronMatching_cff.py reclustering of jets is done again with ak5GenJetsPlusCHadron = ak5GenJets.clone() |
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| const unsigned int nJets = genJets.size(); | ||
| int topDaughterQId = -1; | ||
| int topBarDaughterQId= -1; |
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Hi Nazar
I am trying to understand the code. I am sorry I missed it.
These two variables are changed somewhere?
…ronMatcher to allow direct check of its output
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+1 |
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This pull request is fully signed and it will be integrated in one of the next CMSSW_7_2_X IBs unless changes or unless it breaks tests. |
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This pull request is fully signed and it will be integrated in one of the next CMSSW_7_2_X IBs unless changes (tests are also fine). |
…HadronOrigin Generator level heavy flavour jet origin/flavour identification
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Dear @vadler @monttj @cmsbuild , I have committed the latest version of the GenHFHadronMatcher tool to the same branch CMSSW_7_1_X_AT_genHFHadronOrigin. The new version is using the official JetFlavour Identification tool for hadron-jet matching and has some issues with Pythia8 solved. What should be done in addition to have this latest version in the CMSSW_7_3_X? |
Original implementation of the code for finding flavour, origin and leptonic decay of heavi flavour hadrons/jets.
This implementation still uses a copy of GenJetParticles module to inject ghost hadrons into generator jets.
This could be replaced by an existing new implementation of jet flavour identification which already injects wide range of particles into jets. In order to use reclustered jets from jet flavour ID one would need to replace the input genJets collections in the PhysicsTools/JetMCAlgos/python/sequences/GenHFHadronMatching_cff.py sequences.
A very simple test config file has been added: PhysicsTools/JetMCAlgos/test/genHFHadronMatcher.py
It doesn't produce any input since this would need to write information into some ROOT file. It just checks whether the algorithm runs in the particular release.
This code has been tested to compile and run in CMSSW_7_1_6 release on lxplus0185.