The ProbeAndLongMatcher is developed in the context of tracking efficiency studies.
Its function is to check the overlap level between the probe track and a long track, where the probe track is extracted as daughter of a composite. The overlap is checked in the sub-detectors where the probe tracks have hits, therefore the choice of the sub-detectors is added as property of the algorithm itself.
The algorithm returns both the selected composites and the selected long tracks.
Many thanks to @apearce and @sstahl for the important inputs and suggestions.
We currently put the algo under the folder Phys/RelatedInfoTools, not sure if this is the best location though.
To be tested with LHCb!3246 (merged), Rec!2496 (merged) and Moore!967 (merged). cc @peilian