Add EW skim for 2025 PbPb

[stahlleiton]

PR description:

This PR replaces the previous muon and electron PbPb skims (PbPbEMu, PbPbZEE and PbPbZMu) with one new skim that requires the presence of a high pT (> 15 GeV) electron or muon, labelled as EW skim. The content of this new skim is stored in MiniAOD. After testing on ~5000 minbias events from 2024 PbPb data, the size of the old skims (PbPbEMu + PbPbZEE + PbPbZMu) is about 3% of 2024 RawPrime PDs while the new EW skim is only 1%, reducing the skim PD size by a factor of 3 in 2025 PbPb while enhancing the physics potential (looser selection). The relval 143.203 is added to test the new skim.

@flodamas @mandrenguyen

PR validation:

Tested with relval 143.203

If this PR is a backport please specify the original PR and why you need to backport that PR. If this PR will be backported please specify to which release cycle the backport is meant for:

To be backported to 15_1_X for PbPb data taking

[cmsbuild]

cms-bot internal usage

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-49227/46564

[cmsbuild]

A new Pull Request was created by @stahlleiton for master.

It involves the following packages:

• Configuration/PyReleaseValidation (pdmv)
• Configuration/Skimming (pdmv)

@AdrianoDee, @DickyChant, @antoniovagnerini, @cmsbuild, @miquork can you please review it and eventually sign? Thanks.
@Martin-Grunewald, @denizsun, @fabiocos, @makortel, @salimcerci, @slomeo, @youyingli this is something you requested to watch as well.
@ftenchini, @mandrenguyen, @sextonkennedy you are the release manager for this.

cms-bot commands are listed here

[mandrenguyen]

please test workflow 143.203

[cmsbuild]

+1

Size: This PR adds an extra 16KB to repository
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-af4804/48865/summary.html
COMMIT: a624a92
CMSSW: CMSSW_16_0_X_2025-10-28-1100/el8_amd64_gcc13
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmssw/49227/48865/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially added 1 lines to the logs
• Reco comparison results: 10 differences found in the comparisons
• DQMHistoTests: Total files compared: 51
• DQMHistoTests: Total histograms compared: 3939953
• DQMHistoTests: Total failures: 74
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3939859
• DQMHistoTests: Total skipped: 20
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 50 files compared)
• Checked 218 log files, 188 edm output root files, 51 DQM output files
• TriggerResults: found differences in 1 / 49 workflows

[mandrenguyen]

urgent
Needed for heavy ion data taking.
@cms-sw/pdmv-l2 can you have a look?

[AdrianoDee]

+pdmv

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next master IBs (tests are also fine). This pull request will now be reviewed by the release team before it's merged. @mandrenguyen, @ftenchini, @sextonkennedy (and backports should be raised in the release meeting by the corresponding L2)

[mandrenguyen]

+1