Pi0 Polarizability Meeting Nov 6, 2020
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Contents
Meeting Information
Meeting Time And Location
10:00 am ET (JLab time)
REMOTE
Connecting
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Action Items
- ChiPT calculation to one loop with Coulomb photon (Svetlana and Aleks)
- BGGEN simulations of incoherent backgrounds (Mark)
- Provide feedback to Sergey and Ilya on the draft and calculations (Elton, Rory,...)
Tentative Agenda
- Announcements
- Action Items
- Theory Update
- Beam Test
- Other business
- Next meeting
Minutes
Attending: Alex, Mark, Beni, Ilya, Rory, Elton
- Announcements
- Action Items
- Mark promised to have an update on incoherent backgrounds by the next meeting
- Theory Update
- Calculations by Sergey Gevorkyan
- Elton had a quick on the draft and Rory commented on the paper
- It is a nice summary of the processes that are of interest to us
- The basic formulas are derived but some variables need clear definitions. These will be passed on to Ilya offline.
- Ilya: Serguei is looking for collaborators to fill out the paper, including making numerical calculations.
- Ilya will dust off the FF calculations for the pi0 and see how to apply them to this reaction.
- Elton is willing to help out.
- Readiness Review
- Tentatively, we had discussed trying to schedule a Readiness Review early next year.
- Eugene has tentatively considered putting CPP on the schedule for 2022.
- Elton will try to schedule our next CPP meeting for Thursday Nov 19 at 2 pm.
- Trigger
- We need to have a discussion with Sasha regarding what needs to be done for the trigger. Rory suggested that we use the time for the CPP meeting on Wed for a discussion. Ilya will contact Sasha to check his schedule.
- Elton: Consider multiple TOF configurations running simultaneously.
- Need to adjust thresholds for TOF trigger. Beni: A single threshold setting covers many counters, so the response must be equalized. He is concerned there is a rate dependence of the gains, which needs to be understood. We can use the CPP data at low current (20, 40 nA) and compare with GlueX data.
- Beni: The nominal threshold is 25 mV.
- The FCAL response also needs to be equalized for the NPP trigger, and we prefer the lowest possible threshold consistent with an acceptable rate.
- Other business
- Next meeting
- Friday, Nov 20 at 11 am.