20200928-PREX2-Analysis

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Logistic information

 Time: Monday 9 AM
 Meeting room at JLab:  REMOTE ONLY
 BlueJeans calling instructions:
 Toll-Free Number (U.S.&  Canada):  888-240-2560
 International toll number:         408-740-7256
 Bluejeans CODE: 960 323 569
 Bluejeans link: https://bluejeans.com/960323569

Agenda

  • Proposed Oct 3 meeting (this Saturday): 12-4pm
  • Spreadsheet for final asymmetry calculation: [1]
    • Please talk to Kent, Ciprian, or Paul K. before making changes in the sheet
    • Error propagation notes: HapLog/4223 and HapLog/4240
  • Notes on remaining analysis
    1. Acceptance function
      • optics model - still problems in theta reconstruction. (Siyu, Nilanga)
      • pointing: complete the precision estimate, cross-checks (Siyu, Nilanga)
      • sim. focal plane variables (Hanjie, Devi)
        • scan of focal plane acceptance: contributor to syst uncertainty? (Ryan, Hanjie)
      • apparent vs vertex: radiative correction. Model variations? (Ryan)
      • variation in data (various Q2 runs) (???)
      • selecting “nominal” kinematics, formulating correction factor (Kent with all)
    2. Asymmetry analysis
      • Adding modulation data back in (Tao)
      • filter for end-of-target-life runs (Tao)
      • settling on a systematic error (Tao)
      • crosschecks (Weibin)
      • Detector linearity
        • Beam modulation technique (Ye, Victoria)
        • PITA scan review (Caryn, complete)
        • Summarize detector pedestals (Cameron plus several, complete)
        • global summary of det vs BCM correlation plots (???)
        • select and defend systematic uncertainty
      • summary plots (Tao, Weibin)
    3. Backgrounds
      • rescattering (done)
      • poletip (may be a later study?)
      • Carbon background
        • run time per targets
        • measured target thickness (and uncertainty)
        • simulate carbon acceptance with lead radiative tail
        • (cross-check rate (width) estimates between thick 12C and Pb sandwich targets)
    4. Compton
      • complete compilation/filtering (with latest cuts on signal instabiity) (Adam)
      • verify gain shift (Juan Carlos, Adam)
      • verify pedestal shift (Amali)
      • review (Compton group)

Present

Excused