[PWGEM/Dilepton] reduce data size in Event,Mult,Cent,Qvector

[dsekihat]

PWGEM/Dilepton: reduce data size in Event,Mult,Cent,Qvector
Reduce photon's dependencies on dilepton

[alibuild]

Error while checking build/O2Physics/o2 for 55cfda2 at 2026-02-22 23:55:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/Dilepton/TableProducer/associateMCinfoDilepton.cxx:143:231: error: unused parameter 'v0photons' [-Werror=unused-parameter]
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/Dilepton/TableProducer/associateMCinfoDilepton.cxx:143:231: error: unused parameter 'v0photons' [-Werror=unused-parameter]
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/Dilepton/TableProducer/associateMCinfoDilepton.cxx:143:231: error: unused parameter 'v0photons' [-Werror=unused-parameter]
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2Physics/o2 for 4e2f295 at 2026-02-23 05:37:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/PhotonMeson/Core/EMPhotonEventCut.h:56:8: error: infinite recursion detected [-Werror=infinite-recursion]
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/PhotonMeson/Core/EMPhotonEventCut.h:56:8: error: infinite recursion detected [-Werror=infinite-recursion]
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/PhotonMeson/Core/EMPhotonEventCut.h:56:8: error: infinite recursion detected [-Werror=infinite-recursion]
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/PhotonMeson/Core/EMPhotonEventCut.h:56:8: error: infinite recursion detected [-Werror=infinite-recursion]
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/PhotonMeson/Core/EMPhotonEventCut.h:56:8: error: infinite recursion detected [-Werror=infinite-recursion]
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/PhotonMeson/Core/EMPhotonEventCut.h:56:8: error: infinite recursion detected [-Werror=infinite-recursion]
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/PhotonMeson/Core/EMPhotonEventCut.h:56:8: error: infinite recursion detected [-Werror=infinite-recursion]
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/PhotonMeson/Core/EMPhotonEventCut.h:56:8: error: infinite recursion detected [-Werror=infinite-recursion]
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/PhotonMeson/Core/EMPhotonEventCut.h:56:8: error: infinite recursion detected [-Werror=infinite-recursion]
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/PhotonMeson/Core/EMPhotonEventCut.h:56:8: error: infinite recursion detected [-Werror=infinite-recursion]
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/PhotonMeson/Core/EMPhotonEventCut.h:56:8: error: infinite recursion detected [-Werror=infinite-recursion]
/sw/SOURCES/O2Physics/15108-slc9_x86-64/0/PWGEM/PhotonMeson/Core/EMPhotonEventCut.h:56:8: error: infinite recursion detected [-Werror=infinite-recursion]
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Auto-approving on behalf of @dsekihat.

[mhemmer-cern]

Hello Daiki,
Do I understand correctly that with this commit merged, the photon meson would use the "old" Event, Mult, Cent and QVector tables everywhere, however, the table that maps photon candidates (and the e+e- for Dalitz) to the event these tables will be updated and require the usage of converter?
How does the difference in versions of the main event tables affect the event selection task, that currently is within the dilepton code but is used by both dilepton and photon meson code? Is it compatible with both versions of the event tables?
Can we still create new derived data with the "old" event tables, since they are the ones still used as dependencies in our tasks?

[dsekihat]

Hi Marvin,
Do I understand correctly that with this commit merged, the photon meson would use the "old" Event, Mult, Cent and QVector tables everywhere, however, the table that maps photon candidates (and the e+e- for Dalitz) to the event these tables will be updated and require the usage of converter?
--> The converters are necessary for the indices from photon candidates to the event table. They are prepared in this PR, too.
How does the difference in versions of the main event tables affect the event selection task, that currently is within the dilepton code but is used by both dilepton and photon meson code? Is it compatible with both versions of the event tables?
--> EMPhotonEventCut is also updated and independent from EMEventCut from now on.
Can we still create new derived data with the "old" event tables, since they are the ones still used as dependencies in our tasks?
--> Yes, sure. One should store EMEvents_004 in createEMPhotonEvent.cxx.

[mhemmer-cern]

Hi Marvin, Do I understand correctly that with this commit merged, the photon meson would use the "old" Event, Mult, Cent and QVector tables everywhere, however, the table that maps photon candidates (and the e+e- for Dalitz) to the event these tables will be updated and require the usage of converter? --> The converters are necessary for the indices from photon candidates to the event table. They are prepared in this PR, too. How does the difference in versions of the main event tables affect the event selection task, that currently is within the dilepton code but is used by both dilepton and photon meson code? Is it compatible with both versions of the event tables? --> EMPhotonEventCut is also updated and independent from EMEventCut from now on. Can we still create new derived data with the "old" event tables, since they are the ones still used as dependencies in our tasks? --> Yes, sure. One should store EMEvents_004 in createEMPhotonEvent.cxx.

Thanks a lot for the quick reply and clarifications.

[dsekihat]

To be precise, the necessary converters are o2-analysis-em-v0photonid-converter1, o2-analysis-em-emcid-converter1, o2-analysis-em-phosid-converter1.