Lightweight analyzer for measuring the rates of HLT paths
git clone git@github.com:RazorCMS/TriggerRatesAnalyzer.git HLTriggerOffline/TriggerRatesAnalyzer
scram b
To run: cmsRun test/TriggerRatesAnalyzer.py
The variable listFile in test/TriggerRatesAnalyzer.py specifies the analyzer's input. The indicated file should contain a list of input EDM files, one per line. Each EDM file needs to contain a TriggerResults object.
The analyzer produces an output ROOT file containing a TTree with the trigger decision for each path in each event.
###Measuring rates using QCD pt-binned samples
For each QCD sample, run test/TriggerRatesAnalyzer.py to dump the trigger decisions in each event. Open computeRates.py and update lines 8-11 to specify the names of the input files, QCD cross sections, and instantaneous luminosity. Then compute the total rate for each trigger with python computeRates.py.
Note: for the rate calculation to make sense, make sure HLT_ZeroBias_v1 is included in your HLT menu. If it is not, then events that fail all triggers will not be saved. The rate calculation involves a division by the total number of processed events, and this number will be incorrect if some events have been thrown out.