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)
• Clone online replay - create pass 1 repository --> all updates should go into this repository
• Verify standard.kinematics for HMS and SHMS
  • Check for target mass, duplicates, missing runs, correct energy (Casey)
  • Check angle pictures in CODA file (Penny and Nadia)
  • Verify magnet settings (Burcu)

• 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)
  • Add/verify that momenta and angles used in the analysis are written to report files (including any offsets) (Cameron)
  • Add pointing offsets used in hcana to report files (they're hard-wired!) - add issue to hcana (Casey)
  • Add more stuff to epics tree (helium target temperatures and pressures) (Dave G - def files)
  • Add target encoder to T and scaler tree (Dave G)
  • Verify correct BPM calibration in replay (Dave G)
  • Use high-momentum HMS matrix element files where appropriate (there are least 2 - Jacob might have more by now) (Burcu)
  • Check fast raster calibrations have right sign (Tyler)

Tasks for pass1

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

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