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Updates to SUSY6 for reprocessed data + secondary vertexing algorithm for charged particle decays

Matthew Gignac requested to merge mgignac/athena:dev-vrtsecdecay-21.2 into 21.2

Hi,

This MR contains several updates needed for the disappearing track analysis to analyze the reprocessed data (DATREP-183):

  1. Update AMITag to run over the newly reprocessed data and signal samples (ATLMCPROD-8784).
  2. Add in VrtSecDecay vertexing algorithm into 21.2. Update to allow expansions to >2 track vertices.
  3. Configure secondary vertexing algorithm to reconstruct material interactions for background rejection studies.
  4. Thinning algorithms for newly created vertex containers to keep DAOD increase size minimal.
  5. Update TrackParametersKVU to decorate track if the PV constraint came from a Pileup or PV vertex.

An assessment on the increase in size was performed and found to result in a minimal DAOD size increase (~5%). Moreover, since the additions in this MR are only toggled for select reprocessed data and MC samples, this small increase will only affect SUSY6 requests running over this limited AOD set; the content of other SUSY6 requests should be unaffected.

Cheers, Matthew

Tagging @rysawada, @mmorinag , @onofrio , @cjsmith

Edited by Matthew Gignac

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