D2n meeting-17Apr2009.txt

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General Topics

 - When does the analysis "start"?
   * End of April?
   - weekly meetings via phone/EVO/???
     * meet every 2 weeks on Tuesday 3pm
     * teleconference meeting stuff @ JLab
       * Greg: email brad software/hardware that he has used
       * Brad: look into HW/SW support here at JLab
   - how track progress
     * use the Hall A wiki
     * 
 - Set some formal collaboration meeting dates
   (- Transversity: May 22nd, July 24th, Sept. 25th.)
   * Tentative: Monday, July 27
 - Thesis topic definition for each student?
   * Struct. functions: g1, g2
   * Moments: a2, d2
   * Merge/Compare with proton data from SANE, etc
   * (Diana) A1 @ 4.75, 5.9 GeV/c (see Xiaochao's thesis), flavor separation
     when combined with Hall B data
     - needs BigBite, Target, Beam
   * (Dave) Absolute cross sections (LHRS)
       - 6 GeV cross section, 5 GeV asym on BB?
   * (Matt) Asymmetry (BigBite)
       - 5 GeV cross section, 6 GeV asym on BB?


 - Analysis focus for each student?
   - Beam parameters (Diana?)
     (Trans. experts: Vince)
     - Energy,
     - Current, (calibration)
     - Position (raster correction/calib.)
   - Beam polarimetry (Diana)
     - Compton vs. Moller
   - Target analysis 
     - Trans. experts: Xin (MWDC, optics), Kalyan (Calorim.)
   - LHRS
     - Trans. experts: ?
     - positron analysis
     - optics reconstruction
     - acceptance
       - angle, solid angle bite, etc
       - survey data exists
     - absolute cross section extraction
       - check vs. known Carbon(?) 
     - e/pi separation
   - BigBite 
     - Trans. experts: Xin (MWDC, optics), Kalyan (Calorim.)
     - positron analysis
     - electron extraction
       - optics
         - see Xin's recent report
       - calorimetry
       - e/pi ratios
       - cross section (rough) to compare with LHRS
   - Any theory support that we should queue up?
     * Concensus was that we're OK for now
 - Good thesis examples for analysis approach, problems/solution, etc
   - Xiaochao 
     * scroll to the bottom of: http://hallaweb.jlab.org/physics/experiments/he3/A1n/
   - Patricia
     * http://www.jlab.org/%7Esolvigno/thesis/P_Solvignon_PhD_thesis.pdf


- Analysis practices

 - brad: put the database into an VCS
 - brad: confirm work disk file space on NFS