Revision as of 17:45, 1 March 2017

Meeting Time and Place

The meeting will be on Wednesday March 1, 2017 at 2:15 pm EDT. For those people at Jefferson Lab, the meeting will be in room F326-327.

Meeting Connections

1. To join via a Web Browser, go to the page [1] https://bluejeans.com/115815824.
2. To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 115815824.
3. 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
4. More information on connecting to bluejeans is available.

Reconstruction & Analysis Studies Status

• Spring 2016
• Fall 2016
• Spring 2017

Agenda

1. Announcements
2. Data Production
3. Analysis Focus
4. This Week's Studies
5. Any other studies
6. Upcoming Study Schedule

This Week's Topics

• Talks: Summary/overviews only. Detailed discussions should be held in the appropriate working groups.
• Talks should be limited to 10 + 5 minutes.

Data Production

1. Monitoring Update --- Thomas Britton
2. Calibration Update --- Sean Dobbs
3. Processing Update --- Alex Austregesilo

Analysis Focus: Total Cross Sections

1. J/&Psi, [2]; --- Lubomir
2. η, ρ, ω, φ --- Simon
3. Any others?

Studies: Beamline & Triggering

Updates on experiment, simulation, and the comparison between the two.

1. Flux --- Justin log entry
2. Beam energy --- Beamline Group - log entry
3. Polarization (TPOL & lineshape) --- Beamline Group
4. Trigger emulation --- Alex Somov
5. Triggering efficiency --- Alex Somov

Upcoming Study Schedule

• Updates on experiment, simulation, and the comparison between the two.
• Summary/overviews only. Detailed discussions should be held in the appropriate working groups.
• All talks should be limited to 10 + 5 minutes.
• Next Week: Hit Efficiencies (i.e. Is the detector working?)

1. CDC Hit Efficiencies --- Naomi Jarvis
2. FDC Hit Efficiencies --- Alex Austregesilo
3. BCAL Hit Efficiencies --- Elton Smith
4. FCAL Hit Efficiencies --- Jon Zarling

• Week after next: Alignment & Track/Shower Efficiencies (i.e. Is the reconstruction working?)

1. Drift chamber alignment --- Mike Staib
2. Tracking Efficiencies --- Paul Mattione
3. BCAL Shower Efficiencies --- BCAL Group
4. FCAL Shower Efficiencies --- FCAL Group

• The following week: Other (Any of below if update ready)

1. Track / Hit Matching: BCAL, FCAL, TOF, SC
2. Efficiencies: TOF, SC
3. Means & Resolutions (time, energy, dE/dx): Tracking, BCAL, FCAL, SC, TOF
4. Uncertainties: PID (BCAL, FCAL, TOF), Kinfit (BCAL, FCAL, tracking)
5. Channel/Analysis Studies: Branching ratios, cross sections, SDMEs, beam asymmetries
6. Other reconstruction/analysis issues

Minutes

Data Production

• Thomas and Paul reported that the monitoring shows that their haven't been any serious issues in the data. In the reconstruction tests, the yields of ω and ρ events have been cut in half, but that's because a cut has now been placed on the beam energy at 7 GeV. This also cuts away ~all of the π⁰'s hitting the BCAL for the ω analysis.
• Sean reported that the calibrations are OK.
• The goal is to start our next monitoring launch (first 5 files) over the Spring 2017 data on Friday.
• For the Spring 2016 data, after Mike's DC alignment studies are completed, we will perform our final reconstruction and analysis launches over the golden period of the data (runs 11366 - 11555).

Analysis Focus: Total Cross Sections

• Lubomir reviewed the status of the J/ψ total cross section measurements. There are a number of studies that need to be done, such as understanding the offset from 1 in the E/p for e+/- hitting the BCAL & FCAL, getting a better MC generation distribution, understanding the large discrepancy in the φ→e⁺e^- cross section at the coherent peak compared to a parameterization of old measurements, removing the cut on the kinematic fit confidence level, etc.
• Simon briefly reviewed the status of his studies of the ρ, ω, η, and φ cross sections. They are different between different decay modes, and there seems to be a humped structure that is consistent between the various channels. Simon will try not using the kinematic fit, will look into using Justin's flux measurements, as well as studying the cross section vs. t to take into account any issues with the acceptance corrections due to possibly having the wrong simulated t-slope.
• Other users are also encouraged to do their own cross section studies, and to present their results at these meetings.

Studies: Beamline & Triggering