[PWGLF] First attempt at V0 reconstruction using MFT only

[romainschotter]

First attempt at V0 reconstruction using MFT-only tracks

@ddobrigk @MauriceCoke for your information

[github-actions]

O2 linter results: ❌ 13 errors, ⚠️ 14 warnings, 🔕 0 disabled

[alibuild]

Error while checking build/O2Physics/code-check for ed51b6d at 2026-08-06 07:21:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 30 errors and 55 warnings.'
Found 30 errors and 55 warnings.
++ [[ 30 -gt 0 ]]
++ cat /sw/BUILD/97635d9a3ef05c86921520f9842193c179083aa9/O2Physics-code-check/errors.txt
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:31:1: error: included header mcCentrality.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:37:1: error: included header TriggerAliases.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:53:1: error: included header DataTypes.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:62:1: error: included header TMath.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:64:1: error: included header TProfile.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:66:1: error: included header types.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:68:1: error: included header algorithm is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:84:27: error: no header providing "ROOT::Math::SVector" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:85:31: error: no header providing "ROOT::Math::SMatrix" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:85:65: error: no header providing "ROOT::Math::MatRepSym" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:89:9: error: function-like macro 'BITSET' used; consider a 'constexpr' template function [cppcoreguidelines-macro-usage,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:90:9: error: function-like macro 'BITCHECK' used; consider a 'constexpr' template function [cppcoreguidelines-macro-usage,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:101:8: error: constructor does not initialize these fields: ccdb, mRunNumber, magField, lut, maskTopological, maskTrackProperties, maskK0ShortSpecific, maskLambdaSpecific, maskAntiLambdaSpecific, maskD0Specific, maskAntiD0Specific, maskSelectionK0Short, maskSelectionLambda, maskSelectionAntiLambda, maskSelectionD0, maskSelectionAntiD0, secondaryMaskSelectionLambda, secondaryMaskSelectionAntiLambda [cppcoreguidelines-pro-type-member-init,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:157:20: error: do not declare C-style arrays, use 'std::array' instead [modernize-avoid-c-arrays,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:183:67: error: do not implicitly decay an array into a pointer; consider using gsl::array_view or an explicit cast instead [cppcoreguidelines-pro-bounds-array-to-pointer-decay,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:301:13: error: no header providing "o2::base::MatLayerCylSet" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:371:52: error: no header providing "o2::aod::EvSels" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:1029:45: error: the parameter 'collision' is copied for each invocation but only used as a const reference; consider making it a const reference [performance-unnecessary-value-param,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:1051:17: error: no header providing "o2::base::Propagator" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:1889:5: error: redundant return statement at the end of a function with a void return type [readability-redundant-control-flow,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:1949:5: error: redundant return statement at the end of a function with a void return type [readability-redundant-control-flow,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:1988:34: error: no header providing "o2::track::TrackParCovFwd" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:1993:12: error: redundant explicit casting to the same type 'float' as the sub-expression, remove this casting [readability-redundant-casting,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:2098:7: error: no header providing "TVector3" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:2257:92: error: no header providing "TObject" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:2485:148: error: no header providing "o2::aod::CentNGlobals" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:2485:167: error: no header providing "o2::aod::CentFV0As" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:2485:183: error: no header providing "o2::aod::CentFT0Ms" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:2485:199: error: no header providing "o2::aod::CentFT0Cs" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:2485:215: error: no header providing "o2::aod::CentFT0CVariant1s" is directly included [misc-include-cleaner,-warnings-as-errors]
++ [[ 55 -gt 0 ]]
++ cat /sw/BUILD/97635d9a3ef05c86921520f9842193c179083aa9/O2Physics-code-check/warnings.txt
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:696:24: warning: statement should be inside braces [readability-braces-around-statements]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:698:23: warning: statement should be inside braces [readability-braces-around-statements]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:700:27: warning: statement should be inside braces [readability-braces-around-statements]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:702:19: warning: statement should be inside braces [readability-braces-around-statements]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:704:23: warning: statement should be inside braces [readability-braces-around-statements]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:1231:32: warning: statement should be inside braces [readability-braces-around-statements]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:1236:32: warning: statement should be inside braces [readability-braces-around-statements]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:1241:32: warning: statement should be inside braces [readability-braces-around-statements]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:1246:32: warning: statement should be inside braces [readability-braces-around-statements]
PWGLF/Tasks/Strangeness/forwardlambdakzeroanalysis.cxx:1251:32: warning: statement should be inside braces [readability-braces-around-statements]
[0 more errors; see full log]

Full log here.

[vkucera]

@romainschotter @lhusova Why was this merged despite errors???

[vkucera]

@romainschotter

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