10. Skims

The skim package is a collection of high-level analysis scripts that reduce the data set to a manageable size by applying a simple selection. The input to a skim are Belle II File Format files of processed data. The output are so-called User-defined DST Output (udst) files. These files actually contain more information but fewer events.

Tip

Analysts are recommended to use skimmed udst files as input to their analysis.

To get information about existing skim, ask the current skim group liaison.

Tip

For an introductory lesson, take a look at Section 12.4.11.

10.1. Systematics skims

• 10.1.1. Systematics skims

10.2. Physics skims

• 10.2.1. Physics skims
  • B → charm skims
  • B → charmless skims
  • Charm physics skims
  • Dark sector skims
  • Full event interpretation skims
  • Leptonic skims
  • Low multiplicity skims
  • Quarkonium skims
  • Radiative and electroweak penguins skims
  • Semileptonic skims
  • Time-dependent CP-violation (TDCPV) analysis skims
  • Tau-pair skims

10.3. Standard skim lists

• 10.3.1. Charm lists
• 10.3.2. Dilepton lists
• 10.3.3. Light meson lists

10.4. Information for skim experts

• 10.4.1. Writing a skim
• 10.4.2. Building skim lists in a steering file
  • Skim flags
• 10.4.3. Running a skim
  • b2skim-run: Run a skim
    • Sub-commands:
      • single
      • combined
      • module
  • b2skim-generate: Generate skim steering files
  • b2skim-generate-validation: Generate skim validation scripts
• 10.4.4. Skim tutorial
• 10.4.5. Skim registry
• 10.4.6. Testing skim performance
  • b2skim-stats-submit: Run skim scripts on test samples
  • b2skim-stats-print: Print tables of performance statistics
• 10.4.7. Utility functions for skim experts
• 10.4.8. b2skim-prod: Produce grid production requests
• 10.4.9. b2skim-stats-total: Produce summary statistics for skim package
• 10.4.10. lpns2yaml.py: Convert lists of LPNs to format expected by b2skim-prod