Algorithm that selects particles that either have the same associated PV as a B candidate or that have a MINIPCHI2 greater than a given value (default is 6).
The algorithm takes the B candidates as inputs, as well as two particle lists (for long and upstream particles), and returns a selection.
This algorithm can be given to the extra_ouputs of an HLT2 line.
Part of https://gitlab.cern.ch/lhcb-dpa/project/-/issues/100