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[PWGLF] Fix dndetaHi matching and update correction functionality - #18655

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kimbyumkyu:pwglf/dndeta-hi-fixes-and-studies

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@kimbyumkyu

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Fix MC collision matching and update the correction inputs in dndetaHi.

  • Select a representative reconstructed collision when multiple collisions match one generated collision, and use BC FT0M centrality for zero-reconstruction events.
  • Add a selectable PV-calibrated MC correction mode with consistent generated and reconstructed class assignment.
  • Add INEL>0 ND/SD/DD categories, selection-loss variation inputs, and tracking-efficiency histograms up to 200 GeV/c in both MC correction modes.
  • Add multiplicity-calibration, factorized-correction, and unfolding inputs; guard incompatible process combinations and remove unnecessary PID-table dependencies from data counting.

Validation: local syntax check and Linux build; LHC22o apass7 and LHC24f3c single-file tests reproduce the reference histogram contents and errors. Both Grid tests completed successfully, with Grid/lxplus comparisons passing for 33 data and 43 MC histograms.

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github-actions Bot commented Nov 9, 2026

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O2 linter results: ❌ 0 errors, ⚠️ 22 warnings, 🔕 0 disabled

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