BLTWG Meeting 07/22/2019

Organization

• Time: 11:30 EDT
• JLab meeting room: A110, Hall D counting house
• Connecting: detailed instructions are here
  • H.323 ip address: 199.48.152.152
  • web browser: https://bluejeans.com/536076821
  • phone: 408-740-7256 or 888-240-2560
• Conference id: 536076821
• Present:

Agenda

1. Announcements
2. Photon beam polarization
   • Update on TPOL analysis - Michael D.
   • Systematics studies with 750um converter data, 2018 data - yet to come
   • Update on hadronic asymmetries - any
     • ρ decay asymmetries for 2018-01: (Alex)
       • Asymmetry, update to analysis note
       • PΣ, ψ₀ vs run
       • RCDB mismatch: 41546 (135 -> 90), 41206 (90 -> 0), 41250, 41607, 42386 (AMO -> 45), fixed
   • TPOL readout at high rate - Sasha
3. Tagging accidentals estimation
4. Priority issues for immediate focus
   1. tagger energy scale adjustment - Sasha, Richard
   2. evaluation of beam flux systematic error (spectrum, normalization) - any
   3. PS acceptance systematics - Sasha
5. Preparation for the Fall run
6. Any other business