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BPHY18 update: allow both charge combinations, added re-vertex for di-meson.

Tomas Jakoubek requested to merge (removed):jakoubek_bphy18_dev into 21.2

An update needed for the background studies and NN training in the R(K*) analysis. Changes:

  • di-electron: opposite charge combination only -> all charge combination allowed,
  • di-meson (K* candidate): opposite charge combination only -> all charge combination allowed,
  • new container with re-vertexed di-meson (no cascade decay, only a separate vertex fit for the 2 previously selected tracks).

Changes tested locally (small samples of MC and DATA AODs) and on GRID (one signal MC, one background MC, one DATA run).

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