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[PWGLF] SigmaPlus reco improved selections and tables - #17908

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hfribert wants to merge 6 commits into
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hfribert:improved-tables-and-cuts
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hfribert wants to merge 6 commits into
AliceO2Group:masterfrom
hfribert:improved-tables-and-cuts

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This PR features:

  • A configurable for the pT and rapidity of the MCgen particles with the sigmaHadCorr task, which are saved in the tables (decrease output size)
  • Similar cuts added in the sigmaplusbuilder which uses the PCM method for the reconstruction of one of the photons from the pi0 decay
  • Added selections for the PCM and sigmaplus reco, similar to what was done for the Run2 studies for this method, and added the necessary tables in the DataModel

Henrik Fribert and others added 6 commits September 8, 2026 18:41
… model

- Port missing Run2 cuts: proton/photon-leg autocorrelation check, candidate
  flight-distance window, photon opening/pointing-angle and DCA-to-PV cuts,
  and fix the AntiSigmaPointingAngle vertex-vector counter-rotation to match
  Run2's tangent-chord geometry (was only rotating the proton before).
- Add proton DCA-to-PV window cut and fix TOF-hit tolerance logic to match
  Run2's lenient default (missing TOF hit no longer auto-rejected).
- Align generator-level acceptance (cutRapMotherMC/cutPtGenMC) with
  sigmaminustask/sigmaHadCorr so efficiency studies are directly comparable.
- Tune several candidate cuts (DcaToPV, AntiSigmaPointingAngle, RootCenter,
  DcaProtonGamma) from data-driven signal/background separation checks.
- Clean up LFKinkDecayTables.h: make Radius/Chi2 dynamic columns instead of
  stored, replace the 5 proton/photon PDG-chain columns with a single
  IsSignal bool, and bring the slim tables up to parity with SlimKinkCands
  (decay radius, candidate/proton DCA-to-PV, proton sign, CollisionIdCheck)
  so efficiency can be computed from them the same way as the sibling tasks.
- Fix a McCollisions table-binding crash in processMc.
- sigmaHadCorr: rename single-letter quadratic-solve variables to
  lowerCamelCase per the O2 linter.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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