triggerAnalysis README

Purpose of this code

The purpose of this code is to analyze trigger efficiency for the high-level trigger system in CMS. This code requires the simulated analysis-object data (AOD) and the emulated HLT trigger decicision data (openHLT). In the current version of this code, these data are inputed as single files. Therefore, full forests of AOD and output of openHLT must be merged into a single file for the code to run properly. The reason for this requirement is because the run-lumi-event map, which is used to match AOD and openHLT events (events are not in the same order between the two data types), which is required to calculate the trigger efficiency.

How to generate the necessary data

The code to run here is triggerAnalysisSimple.C. This is a simplified version of an outdated trigger analyzer.

After the necessary files are obtained, run the code as follows:

root -l 'triggerAnalysisSimple.C("/path/to/openHLT.root","/path/to/AOD.root","/path/to/output.root")'