Π polarizability Meeting Nov 17, 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. Generate MC samples of pi+pi- (Elton and Andrew) and mu+mu- Andrew has a file of mu+mu- events from Richard's generator.
  2. Identify a spare VSX crate that can be used in the Hall (Beni). Beni is coordinating with Nick/Fernando
  3. Identify a specific roc that can be easily configured for the CPP experiment (Sergey) Beni is coordinating with Nick/Fernando
  4. Add capability to control.in file for hdgeant4 to propagate tracks beyond FCAL and BCAL (Simon and Richard) Richard has made a change to hdgeant4 that propagates FMWPC truth hits.

Preliminary Agenda

  1. Previous CPP meeting: Nov 10, 2021
  2. Announcements
    • Patrizia has asked for an update on the MWPC testing. I have provided Log entries, but we need to write a report.
  3. Action Items
  4. Software/Calibration for CPP (David, Alex and Sean)
  5. PID + AI - slides (Nikhil)
    • Data for AI (Andrew)
  6. MWPC Testing
    • FMWPC Log Book
    • Mechanical tests in the TEDF building with MWPCs (Arwen, Bilbo and Celeborn?)
  7. CPP and NPP Experiment Configuration
  8. Electronic Configuration (Beni)
  9. hdgeant4 updates (Mark)
  10. Software consolidation (Simon)
  11. GlueX Data Analysis
  12. CPP Simulations
  13. Other business
  14. Next meeting

Minutes

Attending: Alex, Albert, Andrew, Beni, David H., David L., Elton, Ilya, Nikhil, Rory, Simon

  1. Previous CPP meeting: Nov 10, 2021
  2. Announcements
    • Chiral Dynamics 2021. Rory is attending and presented an update on CPP/NPP.
    • Patrizia has asked for an update on the MWPC testing. I have provided Log entries, but we need to write a report.
  3. Action Items
    • See notes under action items.
  4. Software/Calibration for CPP (David, Alex and Sean)
  5. PID + AI - slides (Nikhil)
      • Nikhil presented a first look at data provided by Andrew to develop a mu/pi separation.
      • Need more realistic data that Andrew is working on. Rory: For the pions we probably want to use actual rho data in order to avoid training on possibly unrealistic MC simulation for hadron interactions.
      • There was considerable discussion and feedback.
      • David: One general strategy consideration is to train algorithms on a single track (i.e. have a PID/track) or on two tracks together or "event"(i.e. have a PID algorithms that looks at both tracks at the same time).
      • Rory: The strategy for e/pi has been based on single tracks. Andrew: A benefit of this strategy is that this allows checking individual particle rates (e.g. charge exchange reactions in the e/pi case). Andrew: One may also consider a hybrid approach, i.e. single particles using FCAL info and "event " information in the MWPCs.
      • Elton: The projection of the tracking in the FDCS to the MWPCs should be a useful handle. Andrew: That information is supposed to be available, but a bug set it to zero and should be fixed.
    1. Data for AI (Andrew)
      • Files with mu pairs are located in /w/halld-scshelf2101/home/acschick/CPP_MCFiles/BHgen_muons.
      • Working on providing pion data.
  6. MWPC Testing
    • FMWPC Log Book
    • Mechanical tests in the TEDF building with MWPCs. The proposal is to use Arwen, Bilbo and Celeborn for this purpose.
    • Rory will be in the lab the week of Dec 13. We will keep Frodo and Galadriel in EEL126 so they can be studied.
  7. CPP and NPP Experiment Configuration
    • Elton urged everyone to update this location on the wiki so that it will be the "go to" place to find information for the run.
  8. Electronic Configuration (Beni)
    • Consolidating a list of necessary equipment and coordinating with Nick, Chris and Fernando.
    • It appears all is "under control"
  9. hdgeant4 updates (Mark)
  10. Software consolidation (Simon)
    • Richard has addressed Action item #4 by making the truth information from the MWPCs available.
    • E-mails have detailed where software is being developed. They have now converged on a single CPP branch. Changes are being pushed to this branch, which will eventually be merged into the master.
    • Details of the CPP branches/repositories can be found in e-mail from Simon
    • Everyone contributing to the software should coordinate with Simon if they have any questions about where to make updates.
  11. GlueX Data Analysis
  12. CPP Simulations
  13. Other business
  14. Next meeting