Pythia 8.315

[mseidel42]

Same updates as for Pythia 8.313 (#9612), specifically

• updated Hadronization Variations
• fixed bugs in Vincia merging, recoilStrategyRF, and QCD Colour-Reconnection model

Full changelog here: https://pythia.org/latest-manual/UpdateHistory.html#section0

[cmsbuild]

A new Pull Request was created by @mseidel42 for branch IB/CMSSW_15_1_X/master.

@akritkbehera, @cmsbuild, @iarspider, @smuzaffar can you please review it and eventually sign? Thanks.
@antoniovilela, @mandrenguyen, @rappoccio, @sextonkennedy you are the release manager for this.
cms-bot commands are listed here

[cmsbuild]

cms-bot internal usage

[mseidel42]

Needs cms-sw/cmssw#48422

[smuzaffar]

test parameters:

• pull_requests = Modifications for Pythia 8.315 cmssw#48422

[smuzaffar]

please test

[cmsbuild]

-1

Failed Tests: RelVals
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13f81f/46954/summary.html
COMMIT: dbc8a1d
CMSSW: CMSSW_15_1_X_2025-06-26-2300/el8_amd64_gcc12
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week1/cms-sw/cmsdist/9943/46954/install.sh to create a dev area with all the needed externals and cmssw changes.

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:

• @cms-sw Update tag for GeneratorInterface-EvtGenInterface to V02-12-00 #9946

You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13f81f/46954/git-recent-commits.json
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13f81f/46954/git-merge-result

RelVals

• 29634.75

----- Begin Fatal Exception 27-Jun-2025 13:32:05 CEST-----------------------
An exception of category 'ProductNotFound' occurred while
   [0] Processing  Event run: 1 lumi: 1 event: 4 stream: 0
   [1] Running path 'validation_step'
   [2] Prefetching for module HGCalValidator/'hltHgcalValidator'
   [3] Calling method for module SimTrackstersProducer/'hltTiclSimTracksters'
Exception Message:
Principal::getByToken: Found zero products matching all criteria
Looking for type: edm::AssociationMap<edm::OneToManyWithQualityGeneric<std::vector<TrackingParticle>,edm::View<reco::Track>,double,unsigned int,edm::RefProd<std::vector<TrackingParticle> >,edm::RefToBaseProd<reco::Track>,edm::Ref<std::vector<TrackingParticle>,TrackingParticle,edm::refhelper::FindUsingAdvance<std::vector<TrackingParticle>,TrackingParticle> >,edm::RefToBase<reco::Track> > >
Looking for module label: tpToHltGeneralTrackAssociation
Looking for productInstanceName: 

   Additional Info:
      [a] If you wish to continue processing events after a ProductNotFound exception,
add "TryToContinue = cms.untracked.vstring('ProductNotFound')" to the "options" PSet in the configuration.

----- End Fatal Exception -------------------------------------------------

[mseidel42]

GEN-SIM step ran fine as far as I can see

[smuzaffar]

please test

[cmsbuild]

-1

Failed Tests: RelVals
Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13f81f/47002/summary.html
COMMIT: dbc8a1d
CMSSW: CMSSW_15_1_X_2025-06-29-2300/el8_amd64_gcc12
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmsdist/9943/47002/install.sh to create a dev area with all the needed externals and cmssw changes.

RelVals

• 29634.75

----- Begin Fatal Exception 30-Jun-2025 11:51:53 CEST-----------------------
An exception of category 'ProductNotFound' occurred while
   [0] Processing  Event run: 1 lumi: 1 event: 4 stream: 0
   [1] Running path 'validation_step'
   [2] Prefetching for module HGCalValidator/'hltHgcalValidator'
   [3] Calling method for module SimTrackstersProducer/'hltTiclSimTracksters'
Exception Message:
Principal::getByToken: Found zero products matching all criteria
Looking for type: edm::AssociationMap<edm::OneToManyWithQualityGeneric<std::vector<TrackingParticle>,edm::View<reco::Track>,double,unsigned int,edm::RefProd<std::vector<TrackingParticle> >,edm::RefToBaseProd<reco::Track>,edm::Ref<std::vector<TrackingParticle>,TrackingParticle,edm::refhelper::FindUsingAdvance<std::vector<TrackingParticle>,TrackingParticle> >,edm::RefToBase<reco::Track> > >
Looking for module label: tpToHltGeneralTrackAssociation
Looking for productInstanceName: 

   Additional Info:
      [a] If you wish to continue processing events after a ProductNotFound exception,
add "TryToContinue = cms.untracked.vstring('ProductNotFound')" to the "options" PSet in the configuration.

----- End Fatal Exception -------------------------------------------------