Difference between revisions of "Pi0 Polarizability Meeting Apr 17, 2020"

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##* Many questions and discussion occurred during the presentation.
 
##* Many questions and discussion occurred during the presentation.
 
# The remaining part of the agenda was left tabled for Monday.  
 
# The remaining part of the agenda was left tabled for Monday.  
 +
## Experiment optimization
 +
##* Target position (Beni).. not yet
 +
##** Primex He4 first look: [[Media:npp_primexdata.pdf]]
 +
##** NPP MC test with 6 and 8 GeV Beam energy: [[Media:npp_MC.pdf]]
 
# Other business
 
# Other business
 
# Next meeting
 
# Next meeting
 
#* We will meet at 9:00 am on Monday to continue with Beni's presentation and discuss the strategy for completing the proposal.
 
#* We will meet at 9:00 am on Monday to continue with Beni's presentation and discuss the strategy for completing the proposal.

Revision as of 07:17, 21 April 2020

Meeting Information

Meeting Time And Location

10:00 am ET (JLab time)

REMOTE

Connecting

You can connect using BlueJeans Video conferencing (ID: 949 429 419). (Click "Expand" to the right for details -->):

  1. Make sure you have created a BlueJeans account via your JLab CUE account using this link:

  2. Meeting ID: 949 429 419
    • (you may need to type this in, depending how you connect)

  3. If connecting via Web Browser: click this link (no passcode is needed):

  4. If connecting via iOS or Android App:
    • Use your JLab e-mail address to log in and then enter the meeting ID given above to join the meeting

  5. If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"

  6. If connecting via Polycom unit:
    • Dial 199.48.152.152 or bjn.vc
    • Enter meeting ID above


Action Items

  1. ChiPT calculation to one loop with Coulomb photon (Svetlana and Aleks)
  2. Follow-up contact with Marc to request paragraph (Rory)

Tentative Agenda

  1. Announcements
  2. Action Items
  3. Feedback from collaboration review
    1. Feedback from Barry / Tue Apr 14
      • Rory: The estimate of the incoherent is not easy, but should be uniform in Phi, so polarization is a valuable tool.
    2. Feedback from Joerg
      • We need to clarify that CPP will run with a Pb target and we need an estimate of the calorimeter trigger rate to insure that NPP can run concurrently with CPP. Ilya was volunteered for this task.
  4. Theory update
    1. Discussion with Serguei Gevorkyan / Mon Apr 13
  5. Experiment update
    1. GlueX-doc-4433 Eta background (Elton)
  6. Updates to collaboration draft
    1. Backgrounds to be simulated
      • Background hits
      • BGGEN (PYTHIA)
      • eta production (Elton)
      • Incoherent production (Elton)
      • Npipi
    2. Table of cross sections (Rory and Ilya)
      • Include references to relevant data
      • Add values used in the proposal
    3. Experiment optimization
      • Target position (Beni).. not yet
      • Generate angular distributions for some other targets to compare to Pb
    4. Significance of experiment
      • The expected uncertainties of the extracted gg->pi0pi0 cross section (Fig. 24 of proposal) need to be verified and studied more carefully
    5. Analysis of PRIMEX data
  7. Other business
  8. Next meeting

Minutes

Attending: Jose, Svetlana, Beni, Ilya, Rory, Alex, Mark, Elton.

  1. Announcements
  2. Action Items
  3. Feedback from collaboration review
    1. Feedback from Barry / Tue Apr 14
    2. Feedback from Joerg
  4. Theory update
    1. Discussion with Serguei Gevorkyan / Mon Apr 13
    2. The plan for additional theory requires substantial work. The precision that the polarizability may be extracted with a given cross section uncertainty is still a goal for Jose and Svetlana, but will take time. For the proposal, the will rely on the Dai/Pennington calculations. Calculations to improvements in the extraction will continue past the proposal submission.
  5. Experiment update
    1. GlueX-doc-4433 Eta background (Elton)
      • Rory: It would be nice to plot the elasticity, in addition to missing mass, for ease of comparison with other Primakoff experiments.
      • Many questions and discussion occurred during the presentation.
  6. The remaining part of the agenda was left tabled for Monday.
    1. Experiment optimization
  7. Other business
  8. Next meeting
    • We will meet at 9:00 am on Monday to continue with Beni's presentation and discuss the strategy for completing the proposal.
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