Page History

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• A preliminary investigation of the track-finding efficiency using WABs points to an efficiency of 85-90% for tracks between 1 and 3.5GeV with the caveat that these numbers apply only to the phase space of the selection criteria applied to the parent sample. Tongtong pointed out that requiring the two clusters to be on opposite sides of the calorimeter might be excluding some events where electron curves to join the photon on the "electron side." He also asked if the electron-electron category might include Møllers. Will try to follow up on these questions. PF pointed out that the greater efficiency of the SeedTracker algorithm vs the Kalman Filter disagreed with results from MC studies. It was pointed out that the fiducial cut eliminates tracks with low tan(lambda). This should be revisited.
• A visual inspection of the position of the SVT sensors using the Wired4 event display showed some interesting displacements. Some discussion ensued, but no conclusions were reached.
• The machinery for running the subdetector and the event reconstruction DQM has been revived and is up and running. Omar mentioned that running these applications remotely might not be possible so we should investigate other options to allow performance to be monitored remotely.

Action Items:

• The track-finding efficiency study will be repeated with the latest snapshot, which includes updates to the KF strategies and some bug-fixes.
• The study will be expanded to investigate the efficiencies as a function top/bottom, momentum, etc.
• A standalone Driver will be written to draw the SVT sensor geometries to enable easier inspection of their positions.
• Instructions will be posted on how to use the Wired4 event display.
• A formal presentation on the DQM will be scheduled for two weeks hence.
• Omar will contact Jeremy to revisit the project where DQM plots had been made available on the web.

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