April 11, 2011 (11:30AM), Physics Working Group
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2. An EVO room under GlueX will be reserved
3. Phone:
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- +1-303-248-0285 : International
- then enter participant code: 3421244# (remember the "#"). Phone connection only upon request.
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Agenda
- status of physics analyses
- Grid issues, reconstruction, and PWA of pi+pi+pi-n (Jake Bennett)
- Particle ID and tracking issues using the particle gun pdf(Kei Moriya)
- Analysis of b1pi (Igor Senderovich)
- Kinematic fitting in b1pi (Will Levine)
- Simulations of cascade baryons (Nathan Sparks)
- Analysis of gamma p --> eta pi0 p (Irina Semenova and Andrei Semenov)
- Tracking update (simon)
Minutes
- Grid issues, reconstruction, and PWA of pi+pi+pi-n (Jake Bennett)
-- Jake and Richard have now been able to generate and reconstruct 20 million minimum bias events on the grid.
-- Richard has a list of ~5 issues that he found in the reconstruction code that need to be fixed. He will investigate and report on them soon.
-- Richard expects to have 100TB of disk space on the grid in the next 6 months or so.
-- 20 million minimum bias events corresponds to roughly 5 minutes of data taking. There was some discussion of how this effort will scale to larger data sets.
- Particle ID and tracking issues using the particle gun (Kei Moriya)
-- Kei presented an overview of the Kalman Filtering technique.
-- There was an unresolved question concerning whether the best chi2 to report is after the initial filtering stage or after the smoothing stage.
- Analysis of b1pi (Igor Senderovich)
-- Igor is working on an omega pi pi generator using the IU 3pi generator as a template.
- Kinematic fitting in b1pi (Will Levine)
-- Will is looking at pulls from kinematic fits. It doesn't look like a simple scaling of errors will be enough to correct the pulls. He is currently isolating tracks from different regions of the detector.
- Simulations of cascade baryons (Nathan Sparks)
-- Nathan has found a number of poorly reconstructed tracks with fairly high momentum (1 GeV), and will send a file to David and Simon for diagnostics.
-- Nathan is attempting to reincorporate the Cerenkov detector into the simulation. Richard will help resurrect the code, which is based on a design Eugene presented a few years ago.
- Analysis of gamma p --> eta pi0 p (Irina Semenova and Andrei Semenov)
- Tracking update (simon)
-- Simon presented an update on the tracking code. The residuals (especially in the transverse vertex positions) seem to be a little off. It's still under investigation.
-- The calib package was updated to fix a bug in pedestals, which led to a class of tracks having unrealistically large fitting probabilities.