Various selections in topological_b/init.py miss a vertex chi2 cut or select displaced tracks after the combinatorics

For instance:

some selections, such as this combine tracks with a requirement on the doca, but without a vertex chi2 requirement. This may be on purpose (B->Dpi?), but if it is not, then it is definitely strongly advised to change this. The doca cut can also be applied BEFORE the vertex fit.
quite a few selections apply a cut on the displacement of the daughter tracks /after/ the vertex fit, such as here . It is MUCH faster to apply cuts on daughter tracks as input to the selection (for instance by creating a Filter for the input particles first) or by specifying these cuts as part of the 'CombinationCut'.
a similar problem in bnoc/builders/b_builder.py:make_B2PpPmhh: the cut on the displacement of the track must be made BEFORE the vertex fit. There are more selections in this file with this problem.

Edited Jul 05, 2024 by Wouter Hulsbergen

Various selections in topological_b/__init__.py miss a vertex chi2 cut or select displaced tracks after the combinatorics