Π polarizability Meeting Nov 10, 2021

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Meeting Time And Location

09:30 EST (JLab time) Weekly Meeting

REMOTE during Covid-19

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Action Items

  1. Develop a plan for beam TOF trigger tests (Ilya)
  2. Finalize configuration of MWPC orientations/installation

Preliminary Agenda

  1. Previous CPP meeting: Nov 3, 2021
  2. Announcements
  3. Action Items
  4. Keynote Speaker: Systematic Study of Polarization Determination with BH (Andrew)
  5. Software/Calibration for CPP (David, Alex and Sean)
  6. AI for Experimental Controls testing during CPP
  7. MWPC Testing
  8. CPP and NPP Experiment Configuration
  9. Slow Controls (Beni)
  10. hdgeant4 updates (Mark)
  11. TOF Trigger (Simon)
  12. GlueX Data Analysis
  13. CPP Simulations
  14. PID + AI
  15. Other business
  16. Next meeting

Minutes

Attending: Andrew, Beni, David H., David L., Elton, Nikhil, Rory, Sergey, Simon

  1. Previous CPP meeting: Nov 3, 2021
  2. Announcements
  3. Action Items
  4. Keynote Speaker: Systematic Study of Polarization Determination with BH (Andrew)
    • Andrew presented a plan to study systematic uncertainties in the determination of the polarization using BH electron pairs
    1. Andrew: Possibly choose the range of m_pipi mass over which different polarization orientations agree and compare to full analysis.
      • Can also compare the results of individual polarization orientations with sum of all (where acceptances seem to cancel).
    2. Use different AI tools and compare with current analysis
      • David: May depend on accuracy of model.
      • Another option is to take different sample sets (e.g. 80% for training and 20% for validation) and check differences of output
    3. Elton: Vary cuts used in analysis and check how sensitive the polarization extraction is to a particular cut
  5. Software/Calibration for CPP (David, Alex and Sean)
  6. AI for Experimental Controls testing during CPP
  7. DAQ Configuration (Sergey)
    • What specific crate and roc to use?
    • We probably wish to leave the CDC crate on the upstream platform and use a new (spare) crate.
    • Sergey suggests to not use the cdc roc, which has a unique name. Elton: We should implement a configuration that is easy for the DAQ. Sergey will look for the roc that was used during the FMWPC test in the hall. If not he will configure a new one.
  8. MWPC Testing
    • FMWPC Log Book
    • Elton has coordinated with Chris and Nick for identifying the connections to the electronics.
    • Chris has a prototype of the LV box with two output cables that can provide +/-5V to the MWPCs.
  9. CPP and NPP Experiment Configuration
  10. Slow Controls (Beni)
  11. hdgeant4 updates (Mark)
  12. CPP Analysis (Simon)
    • There are several software updates for CPP in various repositories that should be consolidated.
    • Simon is willing to coordinate the pull requests; he has several himself
    • Simon has implemented the sensitive volumes for the CPP scintillators into hdgeant4
    • Simon and Richard: Propagation of tracks in the MC behind the calorimeters needs hooks in control.in. Richard will present a plan for implementing this.
  13. GlueX Data Analysis
  14. CPP Simulations (David)
    • We need samples of mu+mu- and pi+pi- samples, which can be used for various studies. We should have them in a central location for ease of access.
    • Andrew can generate mu+mu- events with the Rory's event generator
    • The pi+pi- pairs can be generated with gen_2pi_primakof.
  15. PID + AI
  16. Other business
  17. Next meeting