[PWGDQ] add computation of chi2-like values from ML score#16716
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mcoquet642 merged 1 commit intoJun 17, 2026
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The ML score, which takes values between 0 and 1, is converted to a
chi2-like value ranging from zero to infinity with this simple formula:
chi2 = 1 / score - 1
The chi2-like definition allows to apply certain chi2-based selection,
and particulartly the leading/next-to-leading chi2 gap, also in the case
of matching performed with ML models.
aferrero2707
requested review from
alibuild,
iarsene,
lucamicheletti93 and
mcoquet642
as code owners
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O2 linter results: ❌ 0 errors, |
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@mcoquet642 do you prefer that I fix the linter error (it's an explicit include that is missing, but it is not preventing the correct compilation), or I postpone the fix to the next PR to avoid re-triggering the CI? |
mcoquet642
approved these changes
Jun 17, 2026
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The ML score, which takes values between 0 and 1, is converted to a chi2-like value ranging from zero to infinity with this simple formula:
The chi2-like definition allows to apply certain chi2-based selection, and particulartly the leading/next-to-leading chi2 gap, also in the case of matching performed with ML models.