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
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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)