Difference between revisions of "August 9, 2016, Analysis Working Group"
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# Analysis Launch Status | # Analysis Launch Status | ||
# Reconstruction Studies: [https://mailman.jlab.org/pipermail/halld-physics/2016-June/000698.html Schedule] | # Reconstruction Studies: [https://mailman.jlab.org/pipermail/halld-physics/2016-June/000698.html Schedule] | ||
| − | #* [ | + | #* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=3096 Tracking Means, Resolution, & Efficiency] (Paul) |
#* SC Efficiency (Mahmoud) | #* SC Efficiency (Mahmoud) | ||
#* [https://halldweb.jlab.org/wiki/images/b/bb/CDCBadChannels.pdf CDC Efficiency] (Mike) | #* [https://halldweb.jlab.org/wiki/images/b/bb/CDCBadChannels.pdf CDC Efficiency] (Mike) | ||
| Line 27: | Line 27: | ||
* Analysis Launch ~85% complete | * Analysis Launch ~85% complete | ||
* SC Efficiencies: No update, Mahmoud at Gordon Conference | * SC Efficiencies: No update, Mahmoud at Gordon Conference | ||
| − | * CDC Efficiencies: Mike showed that the # of low-efficiency channels is consistent throughout the run | + | * CDC Efficiencies: Mike showed that the # of low-efficiency channels is consistent throughout the run. He and Sean will look into adding them to the MC. |
| + | |||
* FDC Efficiencies (Alex): | * FDC Efficiencies (Alex): | ||
** The improvements in the track reconstruction have corresponded to improvements in the FDC pseudo-hit efficiencies. They are now roughly ~90% in the healthy regions of the detector. | ** The improvements in the track reconstruction have corresponded to improvements in the FDC pseudo-hit efficiencies. They are now roughly ~90% in the healthy regions of the detector. | ||
| − | ** For tracks that pass near the wires in the FDC, the hits are often not reconstructed. | + | ** For tracks that pass near the wires in the FDC, the hits are often not reconstructed. |
| + | |||
* Tracking (Paul): | * Tracking (Paul): | ||
** The missing mass vs beam energy distributions (for all topologies) have a sharp change near 4.2 GeV. This indicates an inconsistency with the TAGH beam energies. Nathan will look into it. | ** The missing mass vs beam energy distributions (for all topologies) have a sharp change near 4.2 GeV. This indicates an inconsistency with the TAGH beam energies. Nathan will look into it. | ||
| − | ** Paul showed tracking resolutions, but they are topology dependent: The resolutions are computed by comparing the reconstructed momentum to the missing momentum, and the missing momentum is topology-dependent. | + | *** The other irregularities in these plots may be due to not subtracting the accidentals. Paul will try this next time. |
| + | ** Paul showed tracking resolutions, but they are topology dependent: The resolutions are computed by comparing the reconstructed momentum to the missing momentum, and the missing momentum is topology-dependent. Thus they are difficult to interpret, and it will take some work to deconvolve the contributions to the resolution from the missing momentum. | ||
** To compute the tracking efficiencies, the sideband subtraction is proving difficult, and is not ready yet. | ** To compute the tracking efficiencies, the sideband subtraction is proving difficult, and is not ready yet. | ||
| + | |||
* FCAL Neutral Efficiencies: Jon is having some issues with large backgrounds at low energies, and is working on improvements. | * FCAL Neutral Efficiencies: Jon is having some issues with large backgrounds at low energies, and is working on improvements. | ||
Latest revision as of 16:58, 24 February 2017
Meeting Time and Place
The meeting will be on Tuesday August 9, 2016 at 1:30 pm EDT. For those people at Jefferson Lab, the meeting will be in room A110.
Meeting Connections
- To join via a Web Browser, go to the page [1] https://bluejeans.com/115815824.
- To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 115815824.
- To join via phone, use one of the following numbers and the Conference ID: 115815824.
- US or Canada: +1 408 740 7256 or
- US or Canada: +1 888 240 2560
- More information on connecting to bluejeans is available.
Agenda
- Announcements
- Analysis Launch Status
- Reconstruction Studies: Schedule
- Tracking Means, Resolution, & Efficiency (Paul)
- SC Efficiency (Mahmoud)
- CDC Efficiency (Mike)
- FDC Efficiency (Alex A.)
- FCAL Neutral Energy & Efficiency (Jon)
- AOB
Minutes
- Analysis Launch ~85% complete
- SC Efficiencies: No update, Mahmoud at Gordon Conference
- CDC Efficiencies: Mike showed that the # of low-efficiency channels is consistent throughout the run. He and Sean will look into adding them to the MC.
- FDC Efficiencies (Alex):
- The improvements in the track reconstruction have corresponded to improvements in the FDC pseudo-hit efficiencies. They are now roughly ~90% in the healthy regions of the detector.
- For tracks that pass near the wires in the FDC, the hits are often not reconstructed.
- Tracking (Paul):
- The missing mass vs beam energy distributions (for all topologies) have a sharp change near 4.2 GeV. This indicates an inconsistency with the TAGH beam energies. Nathan will look into it.
- The other irregularities in these plots may be due to not subtracting the accidentals. Paul will try this next time.
- Paul showed tracking resolutions, but they are topology dependent: The resolutions are computed by comparing the reconstructed momentum to the missing momentum, and the missing momentum is topology-dependent. Thus they are difficult to interpret, and it will take some work to deconvolve the contributions to the resolution from the missing momentum.
- To compute the tracking efficiencies, the sideband subtraction is proving difficult, and is not ready yet.
- The missing mass vs beam energy distributions (for all topologies) have a sharp change near 4.2 GeV. This indicates an inconsistency with the TAGH beam energies. Nathan will look into it.
- FCAL Neutral Efficiencies: Jon is having some issues with large backgrounds at low energies, and is working on improvements.
