[16.0.X] Pixel CPE Generic-only era modifier

[mroguljic]

PR description:

This PR adds a modifier to the Run 3 2026 era configuration that makes the PixelRecHits ESProducers use Generic CPE. The PR is created in case of a possible change in reconstruction during 2026 data-taking.

PR validation:

Tested at configuration level with

cmsDriver.py step3 --era Run3_2026 --conditions auto:run3_data --data -s RECO --no_exec -n 1 --python_filename test_Run3_SiPixelGenericCPE_2026.py
edmConfigDump test_Run3_SiPixelGenericCPE_2026.py >& alternative.txt

The full configuration, w.r.t. the unmodified configuration, only differs in the PixelCPE parameter for the two TkTransientTrackingRecHitBuilderESProducer for

src$ diff alternative.txt central.txt 
85755c85755
<     PixelCPE = cms.string('PixelCPEGeneric'),
---
>     PixelCPE = cms.string('PixelCPEClusterRepair'),
85766c85766
<     PixelCPE = cms.string('PixelCPEGeneric'),
---
>     PixelCPE = cms.string('PixelCPEClusterRepairWithoutProbQ'),

The producers, with the change included, are shown below

process.TTRHBuilderAngleAndTemplate = cms.ESProducer("TkTransientTrackingRecHitBuilderESProducer",
    ComponentName = cms.string('WithAngleAndTemplate'),
    ComputeCoarseLocalPositionFromDisk = cms.bool(False),
    Matcher = cms.string('StandardMatcher'),
    Phase2StripCPE = cms.string(''),
    PixelCPE = cms.string('PixelCPEGeneric'),
    StripCPE = cms.string('StripCPEfromTrackAngle'),
    appendToDataLabel = cms.string('')
)


process.TTRHBuilderAngleAndTemplateWithoutProbQ = cms.ESProducer("TkTransientTrackingRecHitBuilderESProducer",
    ComponentName = cms.string('WithAngleAndTemplateWithoutProbQ'),
    ComputeCoarseLocalPositionFromDisk = cms.bool(False),
    Matcher = cms.string('StandardMatcher'),
    Phase2StripCPE = cms.string(''),
    PixelCPE = cms.string('PixelCPEGeneric'),
    StripCPE = cms.string('StripCPEfromTrackAngle'),
    appendToDataLabel = cms.string('')
)

Changes are expected in all workflows that use Run3 2026 era modifier.

Backport of #50480

[cmsbuild]

A new Pull Request was created by @mroguljic for CMSSW_16_0_X.

It involves the following packages:

• Configuration/Eras (operations)

@cmsbuild, @davidlange6, @fabiocos, @ftenchini, @mandrenguyen can you please review it and eventually sign? Thanks.
@Martin-Grunewald, @fabiocos, @makortel 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

• Backported from Pixel CPE Generic-only era modifier #50480

[cmsbuild]

cms-bot internal usage

[mmusich]

backport of #50480

[mmusich]

@cmsbuild, please test

[cmsbuild]

+1

Size: This PR adds an extra 24KB to repository
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-d46a46/52166/summary.html
COMMIT: b3d9c6c
CMSSW: CMSSW_16_0_X_2026-03-23-1100/el8_amd64_gcc13
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/50497/52166/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially removed 1466 lines from the logs
• ROOTFileChecks: Some differences in event products or their sizes found
• Reco comparison results: 4221 differences found in the comparisons
• DQMHistoTests: Total files compared: 53
• DQMHistoTests: Total histograms compared: 4166533
• DQMHistoTests: Total failures: 3482
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 4163031
• DQMHistoTests: Total skipped: 20
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 52 files compared)
• Checked 227 log files, 198 edm output root files, 53 DQM output files
• TriggerResults: no differences found

[vlimant]

assign ppd

[cmsbuild]

New categories assigned: ppd

@abenecke,@vlimant you have been requested to review this Pull request/Issue and eventually sign? Thanks

[vlimant]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_16_0_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_16_1_X is complete. This pull request will now be reviewed by the release team before it's merged. @mandrenguyen, @sextonkennedy, @ftenchini (and backports should be raised in the release meeting by the corresponding L2)

[ftenchini]

+1