Global QweakSimTriggerScintillator_DetectorSD::ProcessHits (G4Step *aStep, G4TouchableHistory *ROhist): beware: total.neq.kinetic (testing only)
Global QweakSimUserTriggerScintillator_DetectorEvent::TrackID: add DetectorID
Page target energy loss: need to double-check that position and momentum are properly transferred to second primary