Π polarizability Meeting Jan 5, 2022
Meeting Time And Location
09:30 EST (JLab time) Weekly Meeting
REMOTE during Covid-19
You can connect using BlueJeans Video conferencing (ID: 949 429 419). (Click "Expand" to the right for details -->):
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- Generate MC samples of pi+pi- (Elton and Andrew)
- Make a pull request for hdds (Simon)
- Previous CPP meeting: Dec 15, 2021
- Current experimental run is extended till Monday Dec 20. SRC experiment replaced C target with LD2 yesterday.
- Bluejeans being phased out between now and end of January. New system will be ZOOM.
- Action Items
- CPP-NPP trigger
- Software/Calibration for CPP (David, Alex and Sean)
- PID + AI
- Data for AI (Andrew)
- CPP and NPP Readiness Review
- MWPC Testing
- CPP and NPP Experiment Configuration
- Electronic Configuration (Beni)
- hdgeant4 updates (Mark)
- Software consolidation (Simon)
- GlueX Data Analysis
- CPP Simulations
- Log Entry 3959095 (Elton)
- Other business
- Next meeting
Present: Mark Ito (chair), David Lawrence, Rory Miskimen, Andrew Schick, Simon Taylor
Given that we were missing several key players, we decided to defer substantive reports, in particular a report on the chamber work at JLab, until the next meeting. We only dealt with issues/news that were in fronts-of-mind for the participants.
Trigger Test Data
Rory mentioned news from Ilya Larin about trigger test data taken at the end of the SRC run. Data were taken in raw mode, with a random trigger, and there is thought to be enough of it to do a meaningful study.
CPP-Enabled Software Version Set
Elton Smith promised Andrew a version set with all the components in place to do CPP simulation and data analysis in early January. Simon described the issues with two packages.
- Before the break, there was a pending pull request from Simon for HDGeant4. Over the break, Richard Jones merged the changes onto the master and we are now ready to tag it and built it.
- Changes specific to CPP reconstruction still remain on a branch of halld_recon. Most of them deal with the MWPCs and can be put on the master branch since for non-CPP running, there the chambers are not in the geometry, they will be ignored. The exception is the creation of FCAL "clusters" from single hits that have been matched to a charged track. These will create data in the REST file, though in separate element from other FCAL clusters. Mark and Simon will discuss strategies for merging this code.
Call-Backs in ROOT
Andrew asked for guidance in passing non-function-argument parameters to a call-back function used by Minuit in the context of ROOT. Global variables were suggested by collaborator(s) who would only comment if their identities were protected. Andrew and Mark will meet after the meeting to discuss this further.
News from Ebode
David reports that Ebode Onyie has enrolled in a Cypriot university and is working with a professor there. He hopes to continue his research work on CPP from his new institution. He will be making a presentation there on CPP soon. He will send some slides to David for comment in advance of the talk.