[13_0_X] Pythia8 photon flux

[stahlleiton]

PR description:

backport of #43840

PR validation:

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:

[cmsbuild]

A new Pull Request was created by @stahlleiton for CMSSW_13_0_X.

It involves the following packages:

• GeneratorInterface/Pythia8Interface (generators)

@SiewYan, @GurpreetSinghChahal, @alberto-sanchez, @cmsbuild, @menglu21, @mkirsano, @bbilin can you please review it and eventually sign? Thanks.
@alberto-sanchez, @mkirsano 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

• Backported from Pythia8 photon flux #43840

[cmsbuild]

cms-bot internal usage

[stahlleiton]

@hjbossi

[mandrenguyen]

backport of #43840

[mandrenguyen]

please test

[stahlleiton]

Since this PR is meant for HIN MC production, should I also make a backport to CMSSW_13_0_HeavyIon_X ?

[mandrenguyen]

@rappoccio @antoniovilela This one will eventually need to be added to a release to be built on top of CMSSW_13_0_HeavyIon

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-84cd5b/37851/summary.html
COMMIT: 031e799
CMSSW: CMSSW_13_0_X_2024-02-25-0000/el8_amd64_gcc11
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/44258/37851/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• You potentially added 239 lines to the logs
• Reco comparison results: 10 differences found in the comparisons
• DQMHistoTests: Total files compared: 49
• DQMHistoTests: Total histograms compared: 3283620
• DQMHistoTests: Total failures: 8
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 3283590
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 48 files compared)
• Checked 213 log files, 164 edm output root files, 49 DQM output files
• TriggerResults: no differences found

[hjbossi]

Could an authorized user please merge this request?

[mandrenguyen]

Could an authorized user please merge this request?

We have to wait for @cms-sw/generators-l2 to sign

[DickyChant]

@menglu21 and @bbilin any news?

[menglu21]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_13_0_X IBs (tests are also fine) and once validation in the development release cycle CMSSW_14_1_X is complete. This pull request will now be reviewed by the release team before it's merged. @antoniovilela, @sextonkennedy, @rappoccio (and backports should be raised in the release meeting by the corresponding L2)

[rappoccio]

+1