looser cuts in Acts Track Finding branch stopper
The track selection minimum pT and maximum |η| cuts performed in the branch stopper are applied to tracks with poorer resolution than the final track. This MR uses looser cuts in the branch stopper, by default 0.9 times the pT cut (eg. pT≥0.81 GeV in the barrel) and an extra 0.1 in |η| (ie. |η|<4.1).
The previous behaviour can be restored for comparison purposes by setting flags.Acts.trackFindingTrackSelectorConfig=3.
This should fix one source of inefficiency spotted by @astefl. The cuts could probably be further optimised, but hopefully this is a good start.
Edited by Tim Adye