L1 Offline Software Release Notes

This page contains succinct release notes for L1 trigger changes in CMSSW. The list of tags added for each release, with detailed explanations, can be found at SWGuideL1TriggerTagList.

CMSSW 200

Main changes and new features

• New HF-based minbias trigger quantities
• CSC beam halo trigger
• New L1 trigger menus for 1030, 1031 lumi
• HLT seeding possible from `technical triggers'
• Lightweight interface to trigger results for AOD
• Firmware related updates to CSC TPG, CSC TF, DTTF
• ORCON population modules written
• L1 branches renamed

Major bugfixes

• L1CondDB write-read bug fixed for most objects

Known Issues

CMSSW 170

Main changes and new features

• GT emulator included in default L1Emulator sequence to produce L1 decision word and particle-map
• L1Extra now only produces L1Extra particles
• HLT seeding now uses HLTLevel1GTSeed module
• First version of L1CondDB tools available
• All emulator modules now configured via EventSetup
• Various Jet Counts now available for use in GT algorithms
• GCT includes optional 'PiecewiseCubic' jet correction parameterisation + constants tuned on 131

Major bugfixes

• Missing Et phi asymmetry problems fixed

Known Issues

• L1CondDB tools : write-read to SQLite file only succeeds for L1TriggerKey, other objects fail. Under investigation.

CMSSW 160

• Validated against 131HLT6 results
• Analyzers with dependencies on simulation moved to L1TriggerOffline
• Many bug fixes (will add the full list here when time allows)

Review status

Responsible: Vasile Ghete