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Comprehensive CharmSpec extra particle selector

Alex Pearce requested to merge apearce-charmspec-selector into master

The current extra particle selectors for the D02KmPip CharmSpec line will not match all candidates. For example, this decay descriptor is used for the D0 + pi combination:

[D*(2010)+ -> D0 pi+]cc", "[D*(2010)- -> D0 pi-]cc

This can create four combinations:

  1. D*(2010)+ -> D0 pi+
  2. D*(2010)- -> D~0 pi-
  3. D*(2010)- -> D0 pi-
  4. D*(2010)+ -> D~0 pi+

The extra particle selector is:

[X -> D0 ^pi+]CC

which will only match combinations 1 and 2.

The MR replaces the extra particle selector for all D0 + X extra combiners to [X -> Charm ^X]CC, which will capture all combinations.

This might have happened because I thought the D02KmPip line only reconstructed D0 -> K- pi+, but it does reconstruct D~0 -> K+ pi- as well.

/cc @hschrein

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