Recover original AOD event counts
If we want to combine multiple samples and normalize them properly we need to get the number of events in the original sample. As far as I know the main use case is for dijet samples, but it might be useful elsewhere.
A while back we had a tool that would do this for us, which was based around a simple function I put in Athena. It was probably removed when we removed the designated large-R jet dumper (again it was only used there because large-R jets use multijets for a background). We should probably try to revive it. If we go ahead with #131 (closed) this would mean writing an algorithm that adds this information to the output files.
The other option is to update the tool that already exists in Athena, but this seems:
- overcomplicated for what it is doing
- designed around ROOT histograms, which we don't use
So some work is required either way.