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  • Top left: CTBCORE. Overlayed events have lots of events at low CTBCORE. This should be due to the events with low energy
  • Top right: McEnergy vs CTBCORE for overlays: note e.g. the corner at CTBCORE=0 and McLogEnergy=1
  • Bottom left: same for no-overlays: the events in the corner are missing, these are the events that show up in the CTBCORE distributions
  • Bottom right: CTBCORE distrib. for events with McLogEnergy>2.3 to cut low energy events

A more direct check: what is the difference for v17r16 events when overlays do not hit either cal or tkr? Compare newx plot on the right with bottom left in plot above.

Next, a look at the Psf CTB analysis to see what happens in detail to these events