Truth Digit Event Display
Motivation
- Wanted to look at reconstructed MC atmospheric neutrino events to
understand typical event topologies
- Began by looking at demuxed strips and reconstructed tracks
(no reco showers currently?)
- Realised that tracker+fitter was sometimes not correctly reconstructing
muon
- Then realised that it's not always easy to figure out why it gets
it wrong
- Produced a root file with truth digits which could be drawn on top
of the reco digits
Event Display
The event display produces 3 windows:
The first window shows event info, user controls + key and truth digit event
display
The second window is the reconstructed digit event display
The final window overlays the truth and reco digits
Observations:
Looking at a selection of events it became clear that the track finder would
often track through a shower, or add hits to the track that were not consistent.
Simple cuts, e.g. similar track lengths in both U and V planes can probably
prevent this:
Also, sometimes the tracker would get the sign of the muon wrong:
Finally, how to deal with:
Currently the display uses two root files, it would be useful to have all
the FLSDigit info in the eventsr reco tree.
Also want to look at reconstructed events produced by the AtNu package