Π polarizability Meeting May 19, 2021
From GlueXWiki
Meeting Time And Location
09:00 EST (JLab time) Weekly Meeting
REMOTE during Covid-19
Connecting
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Action Items
Preliminary Agenda
- Previous CPP meeting: May 12, 2021
- Announcements
- Screen shots of detector from Stephanie
- Action Items
- CPP and NPP Readiness Review
- Responses to the ERR. This link points to the draft response to the ERR.
- hdgeant4 updates (Beni and Simon)
- Log Entry 3877374 Plugin with latest changes
- GlueX Data Analysis
- CPP Software
- PID + AI
- Other business
- Next meeting
Minutes
Attending: Alex, Andrew, Beni, David, Ilya, Mark, Rory, Simon, Elton
- Previous CPP meeting: May 12, 2021
- Announcements
- Action Items
- CPP and NPP Readiness Review
- Responses to the ERR. This link points to the draft response to the ERR.
- Rory has drafted a response to the questions about MWPC efficiency.
- Send Rory comments on the document. David has already done so.
- hdgeant4 updates (Beni and Simon)
- Mother volume changed to 'site' so that it would not overlap with FCAL
- Added dead region of 10x10 cm2 into a non-sensitive area.
- All changes in the xml, so no changes needed in the hdgeant4 code (Richard's recommendation)
- 2" circular beam hole aperture for beam.
- Rory: Plans to update document with best estimates of the Al honey comb. At the moment a reasonable composite is used
- Added Pb picture frame to the geometry
- Beni: Added geometry file to ccdb. Also included a material file in both the default and the mc_cpp versions
- Rory: Note that the wire spacing is 0.4 in. (not 1.0 cm). Over the length of the chamber that translates into over an accumulation of 2 cm.
- Beni will make the appropriate change to hdgeant4 and place the beam half way between wires 72 and 73.
- Log Entry 3877374 Plugin with latest changes
- Rory: Inquired about the progress on matching muon tracks to single hits in FCAL
- Simon: Code is on a branch that will do this. There is not intention of elevating single hits to FCAL showers. However, a list of hits in FCAL will be available for matching to tracks. He continues to work on this.
- Rory: would like Andrew and Albert to get back to this issue this summer.
- GlueX Data Analysis (Andrew)
- Continues to work on BH analysis of GlueX data.
- Finds differences between data and MC in the elasticity variable.
- Empirical adjustments to the FCAL energy allows the MC to match the data.
- Checks with omegas look good
- Checks with pi0->gamma e+e- show anomalies.
- Results of training, shows anomalies in the pid variables, asymmetric between positive and negatives.
- After matching e+ and e- separately, MC matches data, but e+ and e- elasticity variables are slightly different (as they are for data). A second adjustment brings e+ and e- together
- After training with the new distributions, the pid variables continue to show anomalies in the difference between positive and negatives. Work is ongoing.
- CPP Software
- PID + AI
- Other business
- Next meeting