Add FlatPtGeneration to CloseByParticleGun

[brusale]

PR description:

This PR adds the possibilty to produce CloseBy samples that are flat in pT instead of energy. To enable this feature, FlatPtGeneration has been added. To avoid confusion, EnMax, EnMin, MaxEnSpread are replaced with VarMax, VarMin and MaxVarSpread.

In addition, the variables related to the time assignment listed in the fillDescriptions have been added to the CloseBy configs in Configuration/Generator.

PR validation:

Tested with workflow 24896.0 and private CloseBy samples production, checking the correctness of the distributions.

[cmsbuild]

cms-bot internal usage

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-44008/38935

• This PR adds an extra 32KB to repository

[cmsbuild]

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

It involves the following packages:

• Configuration/Generator (generators)
• IOMC/ParticleGuns (generators)

@menglu21, @cmsbuild, @bbilin, @alberto-sanchez, @GurpreetSinghChahal, @mkirsano, @SiewYan can you please review it and eventually sign? Thanks.
@missirol, @Martin-Grunewald, @grzanka, @fabiocos this is something you requested to watch as well.
@antoniovilela, @rappoccio, @sextonkennedy you are the release manager for this.

cms-bot commands are listed here

[felicepantaleo]

@cmsbuild please test

[felicepantaleo]

@cms-sw/generators-l2 could you please have a look to this PR?

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-4557b8/37576/summary.html
COMMIT: 111e116
CMSSW: CMSSW_14_1_X_2024-02-20-1100/el8_amd64_gcc12
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmssw/44008/37576/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially removed 38 lines from the logs
• Reco comparison results: 58 differences found in the comparisons
• DQMHistoTests: Total files compared: 48
• DQMHistoTests: Total histograms compared: 3248389
• DQMHistoTests: Total failures: 1189
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3247178
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 47 files compared)
• Checked 200 log files, 161 edm output root files, 48 DQM output files
• TriggerResults: no differences found

[menglu21]

+1

[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. @rappoccio, @antoniovilela, @sextonkennedy (and backports should be raised in the release meeting by the corresponding L2)

[antoniovilela]

+1