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instead, define global tags for data and MC in common, and use them in the JetAnalyzer

we have different ways to evaluate the tau ID, try to converge to a single way that would work for any kind of tau ID. This should be implemented in PhysicsTools/Heppy

The tau energy scale changes the tau energy. So need to do it before any selection and before the di-lepton.

This the tau energy changes, the MET will change, so need to propagate the tau energy change to the MET before doing the recoil correction.

Gael has implemented this, a PR will follow.

For electron and muons the Heppy calculation of the ID gives different values that those stored in CMSSW, for sync we got onto CMSSW stored values.

We could think of modularizing more:
e.g.

• TauAnalyzer
  • evaluate tau ID but do not select
  • possibly tau E correction
• Selector (for taus)
  • generic selector module (based on function object provided in cfg)
• MuAnalyzer
• ElectronAnalyzer
• Selector (signal muons)
• Selector (di-muon veto)
• Selector (third-lepton veto)
• DiLeptonAnalyzer
• DiMuonVeto (flags event or creates a collection with the selected muon pair)
• ThirdLeptonVeto (flags event or creates a collection with extra leptons)
• Selector (for di-leptons)
• JetAnalyzer
  • jet energy corrections
• Selector (for jets)
• Selector (select b jets)
• BJetSFAnalyzer
  • promote / demote
• TreeProducer
  • one TreeProducer class per channel, no common base class, make use of functions in a common module (e.g. book_tau, book_e)

When trying to do the following command

xrdcp root://cms-xrd-global.cern.ch//store/user/jbechtel/gc_storage/TauTau_data_2017_CMSSW944/TauEmbedding_TauTau_data_2017_CMSSW944_Run2017B/37/merged_336.root_ .

I get

Run: [ERROR] Server responded with an error: [3011] No servers are available to read the file.

but it works when I comment this line which has been added on june 18th in the commit db1e7e1b8 (added initialization script).

Is this line required?

Along with @GaelTouquet we found this conflict while trying to run Heppy on embedded samples.