Using new ACD merit variables in background rejection
Current background rejection
Prefilters:
Cut |
Purpose |
Gamma Effic |
Bkg Effic |
|---|---|---|---|
BasicTileCut |
Reject events with track pointing at struck tile: |
95.1% |
8.1% |
RibbonCut |
Reject events with track pointing at struck ribbon |
94.9% |
7.7% |
TotalTileEnergyCut |
Reject events with excess ACD total energy |
89.3% |
1.2% |
CornerCut |
Reject event in the corner gap of the ACD |
88.3% |
1.1% |
TileEdgeCut: |
Reject events at tile edges with decreased signal |
88.1% |
1.1% |
ClassificationTree:
Variable |
Importance |
AcdTotalTileEventEnergyRatio |
2034.17 |
Tkr1SSDVeto |
1201.47 |
CTBCORE |
812.28 |
AcdTkr1ActDistNorm |
575.06 |
AcdTkr1ActiveDistENorm |
476.57 |
AcdTotalEnergyNorm |
269.89 |
Tkr1ACDSideZ |
256.61 |
AcdActDistNorm |
118.93 |
Tkr1LATEdge |
107.11 |
AcdTileEnergyNorm |
106.51 |
AcdCornerDocaENorm |
81.52 |
AcdMaxTileEnergy |
74.32 |
AcdTileEventEnergyRatio |
73.48 |
AcdTkr1TileEnergyNorm |
25.67 |
AcdTileCount |
24 |