[PWGHF] [xic0omegac0] Update codes to fix PID assignment in KFParticle

[jinhyunni]

This PR aims to fix PID assignment when using getTrackParCovFromKFP() method in candidateCreatorXic0Omegac0Qa.cxx code.

@fcatalan92, @mtorresc15

[github-actions]

O2 linter results: ❌ 0 errors, ⚠️ 0 warnings, 🔕 1 disabled

[fcatalan92]

@jinhyunni Thanks for spotting and fixing this issue! The PR is fine for me, however I think you can solve the same issue in a cleaner way if you define a helper function that converts the PDG code to the correct o2::track::PID one, as Fernanda did in #16352 .

[jinhyunni]

Hi @fcatalan92, thank you for reviewing this PR and for sharing your thoughts on this point.

I agree that introducing a helper function would make the implementation cleaner. My initial intention was to keep these assignments together with the other decay-channel-dependent variables in the init function, so that all hypotheses for each reconstruction channel are defined in one place.

That said, if you think the helper-function approach would be better for maintainability or consistency with the existing code style, I would be happy to update the implementation accordingly.

[fcatalan92]

That said, if you think the helper-function approach would be better for maintainability or consistency with the existing code style, I would be happy to update the implementation accordingly.

Hi @jinhyunni, yes, if you have time, it would be great if you could update the PR using the helper-function approach. Thanks!

[jinhyunni]

Hi @fcatalan92, thank you for your guidance on how to better organize the code.
I have revised this PR according to your recommendation.
Could you please take another look, and if there are no further changes needed, would you be able to merge this PR?

[alibuild]

Error while checking build/O2Physics/staging for c8b1aa9 at 2026-05-27 07:03:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGHF/TableProducer/candidateCreatorXic0Omegac0Qa.cxx:516:3: error: control reaches end of non-void function [-Werror=return-type]
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2Physics/o2 for c8b1aa9 at 2026-05-27 07:12:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGHF/TableProducer/candidateCreatorXic0Omegac0Qa.cxx:516:3: error: control reaches end of non-void function [-Werror=return-type]
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2Physics/staging for 4fc0b25 at 2026-05-27 07:12:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/slc9_x86-64-slc9_x86-64/0/PWGHF/TableProducer/candidateCreatorXic0Omegac0Qa.cxx:516:3: error: control reaches end of non-void function [-Werror=return-type]
ninja: build stopped: subcommand failed.

Full log here.