[meiALICE]

Add internal validation for verifying Q-vector calculations.

Add additional experimental particle cuts.

Add numContrib hist.

Simplification of naming of some variable.

[github-actions]

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

[alibuild]

Error while checking build/O2Physics/code-check for ccadc27 at 2026-10-30 12:24:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'To reproduce the results below locally, run: '\''aliBuild build O2Physics-code-check -e ALIBUILD_BASE_HASH=upstream/master'\''.'
To reproduce the results below locally, run: 'aliBuild build O2Physics-code-check -e ALIBUILD_BASE_HASH=upstream/master'.
++ echo 'To apply all automatic fixes, add the '\''-e O2PHYSICS_CHECKER_FIX=1'\'' option.'
To apply all automatic fixes, add the '-e O2PHYSICS_CHECKER_FIX=1' option.
++ echo 'See the documentation for more details at: <https://aliceo2group.github.io/analysis-framework/docs/tools/#running-with-o2physics-code-check>.'
See the documentation for more details at: <https://aliceo2group.github.io/analysis-framework/docs/tools/#running-with-o2physics-code-check>.
++ echo 'Found 2 errors and 3 warnings.'
Found 2 errors and 3 warnings.
++ [[ 2 -gt 0 ]]
++ cat /sw/BUILD/c618939f4eee3fe2cac4467211b6d226a9b574cd/O2Physics-code-check/errors.txt
PWGCF/MultiparticleCorrelations/Tasks/multiparticleCorrelationsMei.cxx:363:15: error: no header providing "std::size_t" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGCF/MultiparticleCorrelations/Tasks/multiparticleCorrelationsMei.cxx:984:54: error: no header providing "TMath::TwoPi" is directly included [misc-include-cleaner,-warnings-as-errors]
++ [[ 3 -gt 0 ]]
++ cat /sw/BUILD/c618939f4eee3fe2cac4467211b6d226a9b574cd/O2Physics-code-check/warnings.txt
PWGCF/MultiparticleCorrelations/Tasks/multiparticleCorrelationsMei.cxx:272:45: warning: initializer for member 'fEventCutSwitch' is redundant [readability-redundant-member-init]
PWGCF/MultiparticleCorrelations/Tasks/multiparticleCorrelationsMei.cxx:275:48: warning: initializer for member 'fParticleCutSwitch' is redundant [readability-redundant-member-init]
PWGCF/MultiparticleCorrelations/Tasks/multiparticleCorrelationsMei.cxx:282:36: warning: initializer for member 'fIVHarmonics' is redundant [readability-redundant-member-init]
++ [[ 2 -gt 0 ]]
++ exit 1
--

Full log here.

[abilandz]

Why do you have here new TRandom3(1); and not new TRandom3(0);? Only if you use the latter, ROOT ensures that the seed for random generation is unique in time and space.

[meiALICE]

Because initially I want to ensure that the seed is the same for each time I run it, just like in MC studies. But I didn't think too much for hyperloop case...

I have changed it to 0. Thank you very much for the correction!

[abilandz]

Not now, but in the next PR you could add a configurable option for this argument to cover both use cases.

[abilandz]

Just please replace quickly new TRandom3(1); with new TRandom3(0)- that's relvant if you want to redo this validation study in Hyperloop.