[PWGLF] “Multiplicity dependent study of inclusive and identified charged particles”

[dushmanta97]

Multiplicity dependent study of inclusive and identified charged particles such as pion, kaon, proton.

[github-actions]

O2 linter results: ❌ 6 errors, ⚠️ 10 warnings, 🔕 0 disabled

[maciacco]

@dushmanta97 could you please take into account the following suggestions from the linter checks?

PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:495: Add #include <string> for string [build/include_what_you_use] [4]
PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:655: Add #include <set> for set<> [build/include_what_you_use] [4]

Thanks!

[alibuild]

Error while checking build/O2Physics/o2 for 29126a0 at 2026-01-21 15:54:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:142:39: error: 'kPiPlus' is not a member of 'o2::constants::physics::Pdg'
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:143:39: error: 'kKPlus' is not a member of 'o2::constants::physics::Pdg'
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:144:41: error: 'kProton' is not a member of 'o2::constants::physics::Pdg'
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:845:45: error: expected '(' before 'particleTracksPrimary'
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:845:107: error: expected ')' before ';' token
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:849:45: error: expected '(' before 'particleTracksPrimary'
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:849:107: error: expected ')' before ';' token
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:853:47: error: expected '(' before 'particleTracksPrimary'
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:853:113: error: expected ')' before ';' token
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2Physics/o2 for 4f8af35 at 2026-01-22 10:56:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:14:10: fatal error: Common/Constants/MathConstants.h: No such file or directory
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2Physics/o2 for 2d78b9c at 2026-01-22 23:46:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:144:58: error: 'PionPlus' is not a member of 'o2::constants::physics'
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:145:58: error: 'KaonPlus' is not a member of 'o2::constants::physics'
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:146:60: error: 'Proton' is not a member of 'o2::constants::physics'
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:564:78: error: 'TwoPI' was not declared in this scope; did you mean 'o2::constants::math::TwoPI'?
/sw/SOURCES/O2Physics/14562-slc9_x86-64/0/PWGLF/Tasks/Nuspex/MultiplicityPt.cxx:564:9: error: no matching function for call to 'o2::framework::HistogramRegistry::add(const char [5], const char [31], o2::framework::HistType, <brace-enclosed initializer list>)'
ninja: build stopped: subcommand failed.

Full log here.