LowPtElectrons: embed extra info in pat::Electron for BParking UL

[bainbrid]

PR description:

This PR enables the LowPtElectronModifier to embed additional information in low-pT pat::Electrons for the BParking UL campaign. The additional information concerns photons conversions and impact parameter vars (dxy, dz). The modifier is enabled with the logic (bParking & run2_miniAOD_UL).

This logic is already enabled (by default) in master via PR #33817.

This PR is built on top of PR #33992, which has been recently merged.

PR validation:

Local tests before/after the change based on wf 136.898.

if this PR is a backport please specify the original PR and why you need to backport that PR:

This logic is already enabled (by default) in master via PR #33817.

[cmsbuild]

A new Pull Request was created by @bainbrid for CMSSW_10_6_X.

It involves the following packages:

PhysicsTools/PatAlgos

@perrotta, @jpata, @cmsbuild, @slava77 can you please review it and eventually sign? Thanks.
@rappoccio, @gouskos, @jdolen, @JyothsnaKomaragiri, @ahinzmann, @schoef, @emilbols, @swozniewski, @jdamgov, @mbluj, @nhanvtran, @gkasieczka, @clelange, @hatakeyamak, @ferencek, @gpetruc, @andrzejnovak, @mariadalfonso, @seemasharmafnal, @mmarionncern this is something you requested to watch as well.
@silviodonato, @dpiparo, @qliphy you are the release manager for this.

cms-bot commands are listed here

[bainbrid]

@mariadalfonso @gouskos @crovelli @cavalari @jainshilpi @lfinco

[slava77]

test parameters:

• workflows = 136.898,1304.181

[slava77]

@cmsbuild please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-6947b0/15755/summary.html
COMMIT: 6bdaa19
CMSSW: CMSSW_10_6_X_2021-06-08-1100/slc7_amd64_gcc700
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/34023/15755/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• No significant changes to the logs found
• Reco comparison results: 6 differences found in the comparisons
• DQMHistoTests: Total files compared: 35
• DQMHistoTests: Total histograms compared: 3215678
• DQMHistoTests: Total failures: 3
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3215341
• DQMHistoTests: Total skipped: 334
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 34 files compared)
• Checked 143 log files, 29 edm output root files, 35 DQM output files
• TriggerResults: no differences found

[slava77]

+reconstruction

for #34023 6bdaa19

• code changes are in line with the PR description
  • this completes the backport of LowPtElectrons: NanoAOD integration #33817 for the bParking miniAOD part
• jenkins tests pass and comparisons with the baseline show no differences (the bParking UL miniAOD is not tested)
• local test with 136.898 wf part running only PAT step with run2_miniAOD_UL on AOD produced in 10_6_25 (this represents the bParking UL miniAOD step) show expected result: there are updates in slimmedLowPtElectrons userInts and userFloats variables, the increase in miniAOD size is 1.5% (this should be OK, after a significant decrease in size in LowPtElectrons: final energy regression and ID (back port of 32391) #33589 )

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_10_6_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_12_0_X is complete. This pull request will now be reviewed by the release team before it's merged. @silviodonato, @dpiparo, @qliphy (and backports should be raised in the release meeting by the corresponding L2)

[qliphy]

+1