[PWGUD] fix efficiency and cuts

[miedema-11]

sorry, there is something wrong when I make PR, I rebased the local repo and make a new one to solve conflicts

[github-actions]

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

[alibuild]

Error while checking build/O2Physics/o2 for 967f799 at 2026-04-28 16:24:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGUD/Tasks/flowCorrelationsUpc.cxx:378:78: error: unused parameter 'phi' [-Werror=unused-parameter]
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGUD/Tasks/flowCorrelationsUpc.cxx:378:89: error: unused parameter 'eta' [-Werror=unused-parameter]
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGUD/Tasks/flowCorrelationsUpc.cxx:378:110: error: unused parameter 'vtxz' [-Werror=unused-parameter]
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGUD/Tasks/flowCorrelationsUpc.cxx:394:60: error: unused parameter 'runNumber' [-Werror=unused-parameter]
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2Physics/o2 for 05f4434 at 2026-04-29 08:50:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGUD/Tasks/flowCorrelationsUpc.cxx:382:61: error: 'pt' was not declared in this scope
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGUD/Tasks/flowCorrelationsUpc.cxx:449:37: error: no matching function for call to 'FlowCorrelationsUpc::setCurrentParticleWeights(float&, float&, double&, double&, double&, float&)'
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGUD/Tasks/flowCorrelationsUpc.cxx:559:14: error: no matching function for call to 'FlowCorrelationsUpc::fillYield(const o2::soa::Filtered<o2::soa::Join<o2::soa::Table<o2::aod::Hash<2657540000>, o2::aod::Hash<3135302176>, o2::aod::Hash<2286545062> >, o2::soa::Table<o2::aod::Hash<1410905594>, o2::aod::Hash<446486427>, o2::aod::Hash<2286545062> >, o2::soa::Table<o2::aod::Hash<807122599>, o2::aod::Hash<1454186550>, o2::aod::Hash<2286545062> >, o2::soa::Table<o2::aod::Hash<3917278297>, o2::aod::Hash<1825850698>, o2::aod::Hash<2286545062> >, o2::soa::Table<o2::aod::Hash<4164916329>, o2::aod::Hash<3202835261>, o2::aod::Hash<2286545062> >, o2::soa::Table<o2::aod::Hash<97380440>, o2::aod::Hash<2457333663>, o2::aod::Hash<2286545062> >, o2::soa::Table<o2::aod::Hash<3047285986>, o2::aod::Hash<2462257971>, o2::aod::Hash<2286545062> > > >::iterator&, const FlowCorrelationsUpc::UdTracksFull&, int&, float&)'
ninja: build stopped: subcommand failed.

Full log here.

[vkucera]

@miedema-11 Can you please explain your workflow? I don't understand how you can create a PR which doesn't compile on any system.