Data Analysis - Analysis task list

Analysis tasks

General guidance

• Don't wait for meetings - reach out for help if stuck
• Use the elog: https://hallcweb.jlab.org/elogs/XEM2/

Initial post-run tasks

• Finish Casey's thesis (Casey) (PENDING)
  • Wrestle snake of Nadia's choice(PENDING)
• Clone online replay - create pass 1 repository --> all updates should go into this repository (COMPLETE)
• Verify standard.kinematics for HMS and SHMS
  • Check for target mass, duplicates, missing runs, correct energy (Casey) (COMPLETE)
  • Check angle pictures in CODA file (Penny and Nadia) (PENDING)
    • Angle pictures have been created and added to /mss/ (COMPLETE)
  • Verify magnet settings (Burcu) (PENDING) (HMS done, SHMS ongoing)

• Check run lists against standard.kinematics and run sheets (Nadia - SHMS, Abhyuday - HMS)

• Small replay update
  • Set angle and momentum offsets to zero (Dave G) (COMPLETE) - already zero when I looked
  • Add/verify that momenta and angles used in the analysis are written to report files (including any offsets) (Cameron) (COMPLETE)
  • Add pointing offsets used in hcana to report files (they're hard-wired!). (Casey) (COMPLETE)
  • Add more stuff to epics tree (helium target temperatures and pressures) (Dave G - def files) (COMPLETE): Note: target position only valid for runs starting from first helium running
  • Add target encoder to T and scaler tree (Dave G) (COMPLETE) Not easy to add to scaler tree (needs new code?). Added to T tree, but only valid after switch to He targets
  • Verify correct BPM calibration in replay (Dave G) (COMPLETE)
  • Use high-momentum HMS matrix element files where appropriate (Shujie) (PENDING) Useful optics info
  • Check fast raster calibrations have right sign (Tyler) (COMPLETE (it didn't))
  • Fix rootlogon.C to point to correct directory (Cameron) (COMPLETE)
  • Fix hms_shared.h bug that causes bcm's to not be loaded correctly (Cameron) (COMPLETE)

Tasks for pass1

• Calibrations
  • Beam energy (Dave G) (PENDING)
  • BCM calibrations (Zoe) (PENDING)
  • Reference time cuts (Abhyuday - HMS, Ramon - SHMS) (PENDING)
  • Timing window cuts - divide by detector (PENDING)
  • Cherenkov calibrations (done? check online calibrations) (Cameron and everyone else) (PENDING)
    • Run ranges need to be checked to compare when HV was changed.
  • Calorimeter calibrations (Abhyuday - HMS, SHMS - Zoe) (PENDING)
    • SHMS/HMS - look at de-focused runs
  • TOF - (Cameron - HMS, SHMS - Zoe, Burcu will help!) (PENDING)
  • Drift distances - (Cameron - HMS, SHMS - Zoe, Burcu will help!) (PENDING)
  • After calibrations, perform surveys for 1st replay (number PE, calorimeter resolution, track residuals) (PENDING)
• Run the analysis/production on the farm
  • SHMS: Burcu (PENDING)
  • HMS: Cameron/Tyler (PENDING)

Longer term tasks (towards cross sections/ratios)

• HMS/SHMS acceptance checks
  • Elastics
  • HMS-SHMS comparisons

• Determine kinematic offsets, resolution
  • Single arm elastic
  • Heep
  • Elastic peak width (p-p_elas(theta))

• Target boiling analysis
  • Scalers
  • Tracks

• Backgrounds
  • Pion backgrounds
  • Charge symmetric backgrounds

• Efficiencies
  • Determine/check efficiencies for all PID detectors
  • Trigger efficiency (include 3/4 efficiency)
  • EDTM - parameterize electronic dead time using EDTM + Computer dead time? Use EDTM run-by-run?

• General quality control (after efficiencies are in good place)
  • Yield vs run (for kinematics with many runs)
  • Visual inspection of handful of key quality control graphs

• Data MC comparisons
  • Generate normalized yields with all corrections
  • Generate MC yields using mc_single_arm + radiated cross section model
  • Generate RC tables using externals_all
  • Compare data/MC - iterate model as needed