CosQ dependence (cont.)
In inner layers, increased noise levels & thresholds lead to a significant drop-off of Phi hit finding efficiency for steep tracks (down to ~ 90%)
The effect is apparently due to smaller energy deposition for such tracks in the Phi strips
The “dip” in the track finding efficiency for cosQ ~ 0 is most likely a reflection of this hardware inefficiency
The “dip” in hit finding efficiency for Z hits in layer 5 is not understood